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    • All Subjects > Science
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    Take a trip across America and explore the capital of each state. Students will learn about populations and major products. Students will learn how each state got its name.
    50 States, 50 Capitals DVD
    $99.95
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    		 Acid rain is killing our lakes and forests. Many species are in danger of extinction because of the effects of man-made pollution. Learn how acid rain originated and witness its toll on the environment.
    Acid Rain DVD
    $29.95
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    		 Learn to define acids and bases, and discover the differences between the pH and pOH scales. Also, find out how to use the Periodic Table to determine the relative strengths of acids.
    Acids, Bases, and Salts DVD
    $49.95
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    The thin layer of air that envelops the earth is essential to life. Unfortunately, modern living produces chemical by-products that threaten not only the quality of life, but also the number of living creatures and organisms that can survive in such conditions.
    Air Pollution, Smog, and Acid Rain DVD
    $29.95
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    		 Our solar system contains a sun, nine planets, moons, asteroids, comets, and meteors. Learn about the celestial bodies that compose our little corner of the universe. Acquaint yourself with some interesting facts about Earth and its neighbors. Grades 3-5
    All about the Solar System DVD
    $59.95
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    		 Climate and weather are not the same thing. This video explains what each is and goes on to discuss the various cloud formations that appear in our planet's atmosphere. Aspects of weather such as temperature, humidity, precipitation, wind, and air currents are addressed. Finally, we focus on weather as a powerful force of nature, as we look at thunderstorms, tornadoes, and hurricanes. Grades 3-5.
    All about the Weather DVD
    $49.95
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    Waterfowl and most other wildlife depend upon wetlands for survival; but people, too, need healthy marshes.
    America's Wetlands DVD
    $19.95
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    		 Flowers are the outward manifestation of a complicated reproductive system that ensures the plant's survival.
    Angiosperms DVD
    $19.95
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    		 Exciting, computer graphic animation illustrates your cosmic journey...inside the atom! This is a basic look at the building blocks of the universe.
    Atom: Building Block of the Universe DVD
    $59.95
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    The basic characteristics of insects are identified, some of their most interesting behaviors are detailed, and their beneficial role in the Earth's environment is explained.
    Basic Facts about Insects DVD
    $29.95
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    		 Two videos, <i>The Human Genome Project</i> and <i>Biotechnology on Earth</i>, on one DVD. <br><br> <i>The Human Genome Project</i><br> Help your students learn why the Human Genome Project is revolutionary. The goal of the project (already achieved in rough form in the year 2001) is to decipher all of the genes in the human species. That is, to make public the detailed blueprints for making a human being. This up-to-date program takes you inside an automated gene sequencing laboratory where your students will learn how human genes are isolated, fragmented and how their DNA base sequences are determined. Controversial ethical issues are also addressed. <br><br> <i>Biotechnology on Earth</i><br> The 20th century saw the earth dramatically changed by industrial technology. The 21st century will see the earth even more dramatically changed by biotechnology and its handmaiden, nanotechnology. Urge your students to think instead of dogmatize about their future with the help of this comprehensive new video that presents both the science and the ethical issues in a global perspective.
    Biotechnology
    $59.95
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    		 The 20th century saw the earth dramatically changed by industrial technology. The 21st century will see the earth even more dramatically changed by progress in biotechnology and its handmaiden, nanotechnology. Urge your students to think instead of dogmatize about their future with the help of this comprehensive new video that presents both the science and the ethical issues in a global perspective.
    Biotechnology: A Global Perspective
    $59.95
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    Two videos, <i>Cloning: How and Why</i> and <i>Stem Cells</i>, on one DVD. <br><br> <i>Cloning: How and Why</i><br> Cloning is one of the most controversial of the new biotechnologies in the 21st century. This up-to-date program takes students to Scotland where Dolly made history as the first cloned mammal. Then we move inside Neal First's laboratory at the University of Wisconsin-Madison where Dr. First explains some of the details of just how cloning is done. Students will be challenged to consider the implications of this revolutionary technology for life in the 21st century. <br><br> <i>Stem Cells</i><br> Takes your students inside James Thomson's laboratory at the University of Wisconsin where stem cells were first cultured to learn why this breakthrough is so important in the 21st century. This new video will help you show your students what stem cells are; how they are cultured; why they offer such potential for the future of our health and welfare. The program addresses both the science and the ethical dilemmas that accompany this revolutionary advance in biology. Includes exclusive interviews with pioneers in stem cell technology and stem cell ethics.
    Biotechnology: Cloning and Stem Cells
    $59.95
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    		 Two videos, <i>Genetic Engineering</i> and <i>Gene Guns</i>, on one DVD. <br><br> <i>Genetic Engineering</i><br> The brave new world of cloning, gene splicing, in-vitro fertilization, embryo adoption, BGH and more. How far will we go? How far should we go? Features interviews with biologist Richard Burgess, activist Jeremy Rifkin, and other environmentalists, biologists and experts in bioethics. <br><br> <i>Gene Guns</i><br> This new technology for producing transgenic organisms has the potential to change agriculture as dramatically as anything since the plow and the tractor. Program explains how a gene gun works and what the future looks like for changing the genetic heritage of living things.
    Biotechnology: Genetic Engineering and Gene Guns
    $59.95
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    		 The basic component for living organisms is the cell, but each cell is a microcosm, teeming with specialized organelles that direct the very forces of life.
    Cell: Basic Unit of Life DVD
    $59.95
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    Video footage from around the world and updated informative computer graphics show how chemicals cycle within the biosphere. Emphasized are the oxygen-carbon dioxide cycle, the nitrogen cycle, the water cycle, acid rain and how toxic chemicals can affect the biosphere.
    Chemical Cycles in the Biosphere
    $59.95
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    		 The integrated circuit has changed almost every aspect of our lives. Learn about transistors, see how chips are made, discover how these components work, and explore some of the ways that computers will change our lives even more in the future.
    Chip that Changed the World DVD
    $59.95
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    		 Your heart is only about as big as your fist; but, despite its small size, it is crucial to the efficient functioning of your body. In fact, if it stopped doing its job, the result would be death. Explore the key elements of the circulatory system--the heart, blood vessels, and blood--in this informative video.
    Circulatory System DVD
    $59.95
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    Geographers use data, such as average temperature and precipitation patterns, to delineate climatic regions on a global scale. This vividly illustrated program presents a basic classification scheme that has been adapted from the well-known Koppen system.
    Classifying World Climates DVD
    $19.95
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    		 Cloning is one of the most controversial of the new biotechnologies in the 21st century. This up-to-date program takes students to Scotland where Dolly made history as the first cloned mammal. Then we move inside Neal First's laboratory at the University of Wisconsin-Madison where Dr. First explains some of the details of just how cloning is done. Students will be challenged to consider the implications of this revolutionary technology for life in the 21st century.
    Cloning: How and Why
    $69.95
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    		 The most visible manifestations of weather, clouds can be read by knowledgeable observers to predict weather trends. Much weather lore is based on fact.
    Clouds: Messengers of the Weather DVD
    $39.95
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    The telephone, which revolutionized communication, was invented only a little over a century ago. Now, tools of communication surround us, and we cannot imagine living without them. Our radios and television sets bring us news and images from even the most remote corners of the globe. With a click of a button, we can instantly send written e-mail messages to friends in Europe, South America, Asia, or Africa. In moments, we can access newspapers from every part of the world on our computer screens. Consider the basics of communication and appreciate how rapid communication has changed the world in which we live.
    Communication DVD
    $49.95
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    		 In the age of electronic information, safeguard your computer against deadly viruses or unwelcome intruders. Learn to log on and boot up without fear.
    Computer Security and Viruses DVD
    $19.95
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    		 Much of the American West is so dry that it is classified as desert. Explore the five deserts of the West and see the plants and animals that thrive in an inhospitable environment.
    Deserts of the American West DVD
    $19.95
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    DNA is a blueprint for each of our identities. The way our genes are expressed affects how our bodies function, what we look like, and who we are, in general. Learn how this important and complex molecule functions.
    DNA: The Amazing Double Helix DVD
    $59.95
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    		 Two videos, <b>Climate, Weather & People</b> and <b>The Changing Earth</b>, on one DVD. <br><br> <b>Climate, Weather & People</b><br> This popular two-part program will help you teach the basic science of weather and climate and how this relates to current issues like global warming. Includes the history of how weather instruments were invented, how weather maps were developed and how computer simulations today are leading to new accuracy in weather and climate predictions. <br><br> <b>The Changing Earth</b><br> Provides a dramatic introduction to modern geology and geography. Part 1 takes students on a field trip to Scotland, Switzerland, Iceland and North America to learn of earth history, ice ages and continental plates and how they were discovered. Part 2 teaches fundamental concepts in earth science.
    Earth Science: An Introduction
    $59.95
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    		 Two videos, <i>The Expanding Universe</i> and <i>Living in Space</i>, on one DVD. <br><br> <i>The Expanding Universe</i><br> This two-part program will be an informative and inspiring introduction to modern astronomy. <i>Part 1. A Brief History of Astronomy.</i> Students will learn of the great change during the Renaissance when pioneers like Galileo and Newton launched the scientific revolution. They will also learn about the modern pioneers who first listened in on the Big Bang. <i>Part 2. Planets, Stars and Galaxies.</i> Using video from NASA and new photos from the Hubble telescope, students will learn where our earth is in space. <br><br> <i>Living in Space</i><br> Once upon a time life took a big step forward, moving out of the sea and onto the land. Today humankind is taking an equally big step outwards, living in space. As the Russian space visionary, Constantin Tsiolkovskii said, 'The earth is the cradle of the mind, but you cannot live in the cradle forever.' Part 1 presents a brief history of space exploration to date. Part 2 is named for teacher-astronaut Christa McAuliffe. Her words, 'I touch the future. I teach,' provide the keynote for this dramatic leap into the future of space colonies.
    Earth Science: Space and the Universe
    $59.95
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    The complex interactions of wildlife in the unique environment of the Galapagos Islands provide excellent case studies of the principles of ecology.
    Ecology of the Galapagos DVD
    $19.95
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    		 Three videos, <i>Ecosystems on Earth</i>, <i>Food Chains in the Biosphere</i>, and <i>Chemical Cycles in the Biosphere</i>, on one DVD. <br><br> <i>Ecosystems on Earth</i><br> What is the state of the world's ecosystems as the 21st century begins? A primer on ecosystem problems and opportunities with the stress on new efforts to save endangered species, new efforts to avert global warming and new efforts to preserve and restore to health all ecosystems, including agricultural and urban ones. <br><br> <i>Food Chains in the Biosphere</i><br> Students will learn how producers, consumers, decomposers and the abiotic elements are connected in ecosystems and how ecosystems make up a biosphere. Program features new computer graphics and live-action video illustrating important concepts in modern ecology. <br><br> <i>Chemical Cycles in the Biosphere</i><br> Video footage from around the world and updated informative computer graphics show how chemicals cycle within the biosphere. Emphasized are the oxygen-carbon dioxide cycle, the nitrogen cycle, the water cycle, acid rain and how toxic chemicals can affect the biosphere.
    Ecosystem Cycles
    $79.95
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    		 Two videos on one interactive DVD. <br><br> <i>The Story of Evolution</i> shows how life has changed through the ages and how the modern theory of evolution by natural selection explains how these changes have come about. <br><br> <i>The Story of Ecosystems</i> outlines the concepts that modern ecologists use to understand ecosystems today. Acid rain, global warming and species extinction are discussed and illustrated.
    Ecosystems and Evolution
    $69.95
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    What is ecology? How can it help us understand the world we live in? A 2005 revised and updated program ideal for life science and environmental studies. <br><br> <i>Part 1. From Nature Study to Ecology.</i> The naturalist tradition of Henry David Thoreau is contrasted with the hard science tradition of modern quantitative ecology. New video footage from Walden Pond and from Silver Springs, Florida, where Eugene and Howard Odum did their pioneering work in the 1950s. <br><br> <i>Part 2. The Web of Life.</i> Carefully outlines concepts used by ecologists to study ecosystems today. Program includes a look at how human values play key roles in environmental choices.
    Ecosystems: An Introduction
    $69.95
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    		 Three videos, <i>Deserts</i>, <i>The Galapagos Islands</i> and <i>A Tropical Rain Forest</i>, on one DVD. <br><br> <i>Deserts</i><br> Takes you and your class to the Sahara Desert of North Africa, the Mohave, Colorado and Great Basin deserts of the southwestern United States to learn facts, concepts and values that make these unique ecosystems both dreaded and loved. <br><br> <i>The Galapagos Islands</i><br> The islands Charles Darwin made famous are still alive and well 150 years after his visit. Take your students on a field trip to this unique ecosystem to learn more about the connections between ecosystems and evolution, and the fight to save endangered species. <br><br> <i>A Tropical Rain Forest</i><br> Saving the Amazonian rain forest is a high priority today. This program takes your students into a small section of the Amazonian rain forest to learn how this unique ecosytem functions today. Diversity of species, soil impoverishment and interconnectedness are stressed.
    Ecosystems: Deserts, Islands, and Rain Forests
    $79.95
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    		 Three videos, <i>A New England Pond</i>, <i>The Great Lakes Ecosystem</i> and <i>The Web of Life</i>, on one DVD. <br><br> <i>A New England Pond</i><br> Some of the best work in ecology has been done on small fresh water pond ecosystems. This live-action video uses a small New England pond to teach basic concepts in ecosystem science. Food webs are illustrated, the abiotic-producer-consumer-decomposer cycles, problems of acid rain and pond succession are also stressed. <br><br> <i>The Great Lakes Ecosystem</i><br> The largest chain of fresh water lakes in the world has special ecological problems of its own. This live-action video explains some of the challenges today. Stressed are the sea lamprey, toxic wastes in the lakes, the coming of the zebra mussel and the ruffe fish. <br><br> <i>The Web of Life</i><br> Explains the concepts used by ecologists today to study ecosystems. Food chains, food webs, cycling of elements, toxic wastes and more.
    Ecosystems: Great Lakes, a Pond, and the Web of Life
    $79.95
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    Electricity is all around us. Learn how to use this powerful source of energy without putting yourself at risk.
    Electrical Safety: Basic Facts DVD
    $49.95
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    		 Relying on evidence from the past as well as the present, this program explains how energy availability relates to economic growth and human progress. Updated in 2007 it provides ideal introduction to energy issues of 21st century in secondary and college classrooms. This new DVD version includes guided questions and quizzes to help the teacher reinforce concepts recommended in the National Science Education Standards. <br><br> <i>Part 1. A Brief History of Energy and Society.</i> Traces the part played by energy throughout human history-muscle power to wind and water to fossil fuels to nuclear and solar energy and to large increases in efficiency today. <br><br> <i>Part 2. Energy for Today and Tomorrow.</i> Explains basic concepts in energy science and offers insights into energy production and use for today and tomorrow.
    Energy and Society
    $69.95
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    		 As the third millennium begins, earth relies ever more heavily on fossil fuel energy. This program helps students understand basic laws of energy flow, the importance of energy supplies for industrial civilizations, and the options for the new century. Stresses the importance of research into alternatives, including nuclear power, that do not add to global warming. <br><br> “One of the Best Science Films from the past five years.” <i>AAAS Science Books and Films.</i>
    Energy on Earth
    $69.95
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    Three videos, <i>Charles Darwin Explains the Diversity of Life</i>, <i>The Story of Evolution</i> and <i>The Origin of Species: Creationism and Evolution</i>, on one DVD. <br><br> <i>Charles Darwin Explains the Diversity of Life.</i><br> Come with us to Charles Darwin's home in Down, England; to the South American rainforest; and to the Galapagos Islands to learn how Darwin laid the foundation for modern biology with the revolutionary theory of evolution by natural selection. <br><br> <i>The Story of Evolution</i><br> Explains how life has changed through the ages and how the modern theory of evolution by natural selection shows how these changes have come about. Includes new work on dinosaur extinction. <br><br> <i>The Origin of Species: Creationism and Evolution</i><br> When Charles Darwin visited the Amazonian rainforest and the Galapagos Islands in 1835 he, along with most of the scientific community of his day, believed in creationism. Come with us to these same sites today to see why he and scientists following him abandoned this theory and replaced it with the theory of evolution by natural selection. <br><br> This program explains clearly and convincingly just why creationism was rejected. It also explains the differences between fact and theory in science and explains some lively differences about evolution theory among scientists today.
    Evolution Explained
    $89.95
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    		 Teaches the basic science of modern evolution theory. Includes a history of how evolution was discovered and reviews present-day controversies. Significantly updated in 2007. Would be of effective help to teachers challenged by students who hold to non-scientific theories like Creationism and Intelligent Design. <br><br> <i>Part 1. How Theories of Evolution Were Developed.</i> Exclusive on-site video in the Galapagos Islands and at Darwin's study in England help demonstrate the achievement of this pioneer. <br><br> <i>Part 2. Evolution by Natural Selection.</i> A straight-forward presentation of the theory of evolution by natural selection as it is understood by most biologists today.
    Evolution: Theories and Natural Selection
    $59.95
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    		 Keeping the earth habitable for people and for other species may be the biggest challenge that faces us in the 21st Century.
    Extinction: End of the Line DVD
    $19.95
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    At any moment, you may encounter a person who has been seriously injured. Would you know what to do? This interactive, question-and-answer format teaches proper first aid techniques for 15 common emergency situations.
    First Aid Video Quiz DVD
    $59.95
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    		 Learn about the specific traits that scientists look for when classifying organisms. Also included is information about: the differences between prokaryotic and eukaryotic cells, oxygen and nutritional needs, and reproductive characteristics.
    Five Kingdoms of Life DVD
    $59.95
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    		 Students will learn how producers, consumers, decomposers and the abiotic elements are connected in ecosystems and how ecosystems make up a biosphere. Program features new computer graphics and live-action video illustrating important concepts in modern ecology.
    Food Chains in the Biosphere
    $59.95
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    The brave new world of cloning, gene splicing, in-vitro fertilization, embryo adoption, BGH and more. How far will we go? How far should we go? Features interviews with biologist Richard Burgess, activist Jeremy Rifkin, and other environmentalists, biologists and experts in bioethics.
    Genetic Engineering
    $69.95
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    		 Geysers and hot springs have always been fascinating. Today, the concern is whether to develop their economic potential or to preserve their aesthetic benefits.
    Geothermal Processes: Geysers and Hot Springs DVD
    $19.95
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    		 Once, nearly one-third of the earth was covered by glaciers. In this video, learn about the formation of glaciers, weathering processes, and glacial deposits.
    Glaciers and Glacial Landforms DVD
    $39.95
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    Learn what creates the Greenhouse Effect and discover how it affects weather patterns all over the world. Understand that we must take the threat of global warming seriously to ensure the continued survival of our species.
    Global Warming and the Greenhouse Effect DVD
    $59.95
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    		 Explains the science and the uncertainties behind current global warming debates in Congress and the press. Program includes interviews with experts like: Richard Lindzen, MIT; Reid Bryson, University of Wisconsin-Madison; Howard Odum, University of Florida; Thomas Lovejoy, Smithsonian Institute and others.
    Global Warming: Experts Speak
    $79.95
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    		 Three videos, <i>Marie Curie Finds Radium and Radioactivity</i>, <i>Louis Pasteur Proves Germs Cause Disease</i> and <i>Galileo Galilei Moves the Earth</i>, on one DVD. <br><br> <i>Marie Curie Finds Radium and Radioactivity</i><br> Take your students to Paris to visit the laboratory of Marie Curie to learn the personal story of how she and her husband, Pierre, worked long hours in a nearby shed to discover the new element radium, and how Marie Curie coined the word 'radioactivity.' <br><br> <i>Louis Pasteur Proves Germs Cause Disease</i><br> Meet the scientist who benefited humanity more than any other. Take your students on a field trip to sites where Pasteur discovered that germs cause disease-and found ways to prevent disease. <br><br> <i>Galileo Galilei Moves the Earth</i><br> The most giant of all giant steps in science and society happened during the Renaissance when men like Galileo launched the scientific revolution and changed forever the way humans view the universe.
    Great Moments in the History of Science
    $79.95
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    Once the dominant plants on the planet, the non-flowering gymnosperms, though less abundant now, are still essential to the delicate balance of the earth's ecosystem.
    Gymnosperms DVD
    $19.95
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    		 Two videos, <i>Disease and Health</i> and <i>Toxic Wastes</i>, on one DVD. <br><br> <i>Disease and Health</i><br> Adds much needed historical perspective to questions of disease and health today. Stresses the need for science and for common sense. <i>Part 1. Disease and Health in Past Ages.</i> Focuses on giant steps that medical science has taken to conquer disease and to foster health. Highlighted is the work of pioneers like Jenner, Koch, Pasteur and Salk. <i>Part 2. The Science of Health.</i> An overview of consensus and dispute within the scientific community about health and disease today. Personal choice issues like smoking, diet and drugs are emphasized. <br><br> <i>Toxic Wastes</i><br> Students are often bewildered by news stories about the latest toxic waste hazards. With this popular program you can help your students better understand the science of toxicology. <i>Part 1. A History of Toxic Wastes in the Biosphere.</i> Shows how the 'good old days' had serious toxic waste problems too. How they solved past crises gives clues for today. <i>Part 2. Toxic Wastes Today.</i> Explains the basic scientific concepts needed to convert fear into intelligent action.
    Health Science: Diseases and Toxicology
    $79.95
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    		 Examine humankind's growth throughout history and discover the effects that the human population has had upon the planet.
    History of Human Population DVD
    $59.95
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    The composition of atoms and how they share, borrow, or steal electrons to form molecules is explained in this basic view of atomic structure.
    How about Atoms and Molecules? DVD
    $59.95
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    		 Everything that surrounds you is matter. In this program, learn about the rules that govern matter and find out how the three principal states of matter differ from one another. Many other interesting facts concerning matter are also presented in this informative, yet easy-to-understand video.
    How about Matter? The Nature of Matter DVD
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    		 The interaction of fresh and salt water in the Laguna Madre, along the Texas coast, creates a rich mix of nutrients that attracts many forms of life.
    How an Estuary Works DVD
    $19.95
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    Every experiment that's conducted adds to our collective knowledge of the world. Learn how to use the 'scientific method' and find out how to conduct your experiments in the most objective way possible. After watching this video, you'll also know how to evaluate your data and how to analyze your results.
    How to Conduct an Experiment DVD
    $59.95
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    		 Identify different microscopes and learn the working parts of the light microscope in order to view the world of the very small.
    How to Use a Microscope DVD
    $49.95
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    		 The body's immune system is essential for survival. Learn how it defends us against foreign substances, such as bacteria, fungi, viruses, protozoa, parasites, potentially toxic cells, or abnormal cells. The immune system attacks invaders, or antigens, and maintains a memory of doing so, thereby enabling it to respond more quickly and with greater strength if the body is ever exposed to the same threat again. Understand what antibodies are and learn how they're produced. Immunodeficiency and autoimmune diseases are discussed, so students will know what happens when the immune system does not function as it should.
    Human Immune System DVD
    $89.95
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    When we're born, all of the parts of our reproductive systems are in place, but we're not able to reproduce until puberty causes our bodies to undergo drastic changes. Learn about GnRH, the hormone that initiates these changes, and understand why puberty happens to some people at nine and to others at fifteen. Learn the names of the various parts of the male and female reproductive systems. See what the individual organs look like and learn where they're located. Understand how each organ in the reproductive system functions and see how the male and female systems work together to create a new life.
    Human Reproductive System DVD
    $89.95
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    		 Learn how our skeletons support our bodies, protect our organs, aid in movement, produce blood cells, and store important minerals.
    Human Skeletal System DVD
    $79.95
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    		 Students have embraced the Internet and they know that it can enhance their educational experiences. Now, teachers can focus on what the Internet can do for them. Educators can find terrific lesson plans, download ancillary materials for the classroom, e-mail colleagues, and sign up for on-line college courses.
    Internet for Teachers DVD
    $39.95
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    The Amazon of South America flows through the richest area of plant and animal life on the planet. Explore this magnificent basin and meet the people who enjoy nature's bounty. Also, learn about those who threaten to destroy the entire region.
    Introducing the Amazon DVD
    $19.95
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    		 Knowledge of the atom is basic to all of the sciences. Use this program in any science course to help students learn what an atom is and what it means in human terms today. <br><br> <i>Part 1. How We Found Out About Atoms. </i> Tells the dramatic story of humankind's search for the ultimate unit of matter. We begin in ancient Greece, and end with the 20th century revolution of Bohr, Einstein and Curie. <br><br> <i>Part 2. What Is an Atom?</i> Gives the student a clear, dramatic picture of what we know and what we don't know about atoms today.
    Introducing the Atom
    $89.95
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    		 An Interactive DVD. Clearly and simply presents basic information on one of the most important concepts in modern science-the gene. New computer animations help clarify the concepts. Includes guided questions and quizzes to help teachers reinforce concepts recommended in the National Science Standards. <br><br> <i>Part 1. How Genes Were Discovered.</i> Dramatizes the history of genetic discovery from Mendel in his monastery garden to Watson and Crick at the Cavendish Laboratory in England. <br><br> <i>Part 2. What Is a Gene and How Does It Work?</i> Outlines the basic picture we have today of what a gene is and how it works. Includes new material on cloning and the human genome project.
    Introducing the Gene
    $89.95
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    The kingdom, Protista, is made up of a variety of complex and diverse organisms. In this program, you will learn about the three main groups of protists, diseases caused by protists, and the importance of protists in our ecosystem.
    Kingdom Protista DVD
    $49.95
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    		 Basic lab concerns such as acids, flammables, and various types of equipment are covered in this program that's designed to augment a teacher's basic instructions.
    Lab Safety for Junior and Senior High School DVD
    $19.95
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    		 Today, we are seeing the delicate environment necessary to create and sustain life altered by man-made pollutants. Find out why it is imperative that people find ways to reverse this dangerous trend.
    Life in the Greenhouse DVD
    $19.95
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    Two videos, <i>The Biosphere</i> and <i>Ecosystems</i>, on one DVD. <br><br> <i>The Biosphere</i><br> Global warming, ozone depletion and acid rain all make headlines and the evening news. In order to understand these and other global environmental problems, students need to understand what biologists call the biosphere. <i>Part 1. A Brief History of the Biosphere.</i> How did the biosphere come to be? Traces the history of four billion years of the growth of the atmosphere and of changing life on planet earth. <i>Part 2. The Biosphere Today.</i> Gives the student a clear, dramatic picture of the scientific concepts needed to understand the biosphere today. <br><br> <i>Ecosystems</i><br> What is ecology? How can it help us understand the world we live in? An up-to-date program ideal for life sciences and environmental studies. <i>Part 1. From Nature Study to Ecology.</i> The naturalist tradition of Henry David Thoreau is contrasted with the hard science tradition of modern quantitative ecology. <i>Part 2. The Web of Life.</i> Carefully outlines concepts used by ecologists to study ecosystems today. Program includes a look at how human values play key roles in environmental choices.
    Life Science: The Biosphere and Ecosystems
    $79.95
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    		 Two videos, <i>The Gene</i> and <i>Evolution</i>, on one DVD. <br><br> <i>The Gene</i><br> Clearly and simply presents basic information on one of the most important concepts in modern science--the gene. New computer animations help clarify the concepts. <i>Part 1. How Genes Were Discovered.</i> Dramatizes the history of genetic discovery from Mendel in his monastery garden to Watson and Crick at the Cavendish Laboratory in England. <i>Part 2. What Is a Gene and How Does It Work?</i> Outlines the basic picture we have today of what a gene is and how it works. Includes new material on cloning and the human genome project. <br><br> <i>Evolution</i><br> Teaches the basic science of modern evolution theory. Includes a history of how evolution theories were first developed and reviews present-day controversies. <i>Part 1. How Theories of Evolution Were Developed.</i> Exclusive on-site video in the Galapagos Islands and at Darwin's study in England help demonstrate the achievement of this pioneer. <i>Part 2. Evolution by Natural Selection.</i> A straight-forward presentation of the theory of evolution by natural selection as it is understood by most biologists today.
    Life Science: The Gene and Evolution
    $79.95
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    		 Two videos, <i>The Mystery of Light</i> and <i>The Mystery of Electricity</i>, on one DVD. <br><br> This is a special enhanced interactive DVD. It features two complete video programs along with guided questions, timelines and quizzes. <br><br> <i>The Mystery of Light</i><br> Explores the mystery of light as both a wave and a particle. Concepts covered include: electromagnetic spectrum, quanta, wavelength, frequency, reflection, diffraction, conservation of matter, fiber optics. <br><br> <i>The Mystery of Electricity</i><br> Explores the mystery of electricity as power, as information and as the glue that holds atoms and molecules together. Concepts covered include: electromagnetic spectrum, quanta, wavelength, frequency.
    Light and Electricity
    $69.95
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    Explore various ecosystems that have provided the specific combinations of climate and soil necessary to nurture living communities of plants and animals.
    Major World Ecosystems DVD
    $129.95
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    		 Journey into a world of fantastic change, as the mysteries of mitosis and meiosis are revealed.
    Mitosis / Meiosis DVD
    $89.95
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    		 Begin your course in biology or life science with this program. Or use it to review or sum up. Students will learn how intertwined all the sciences are today on the frontiers of biology. <br><br> Part 1 takes your students on a brief but informative tour of the history of biology. Special attention is paid to pioneers like Darwin, Mendel, Pasteur and, in our time, Watson and Crick. <br><br> In Part 2 students meet some outstanding biologists of today. Featured are two of the founders of modern ecology, Eugene and Howard Odum, geneticist Richard Burgess, biochemist Bruce Ames and others. <br><br> This is an interactive DVD. In addtion to the video program, the disc has guided questions and mastery quizzes to reinforce concepts recommended in the National Science Education Standards.
    Modern Biology: An Introduction
    $69.95
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    Give your students an overview of chemistry-yesterday, today and tomorrow. This live-action program includes a segment on the potential of buckyballs, the soccer-ball-shaped molecules that promises a whole new world of chemistry in the 21st century. <br><br> Part 1 is a short history of chemistry from the alchemists to the 20th century wizards. Part 2 includes exclusive interviews with outstanding modern chemists including Bassam Shakashiri, Regina Murphy, Spencer Silver (who invented the <i>Post-It Note</i> adhesive for 3M), Donald Huffman (who first made buckyballs), and others. <br><br> This is an interactive DVD. In addition to the video program, the disc has guided questions and mastery quizzes to reinforce concepts recommended in the National Science Education Standards.
    Modern Chemistry: An Introduction
    $69.95
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    		 Astronomy, geology and meteorology are are surveyed in this live-action video updated in 2004. <br><br> Part 1 tells the story of the pioneers in the earth sciences with special attention to James Hutton, the Scotsman whom many consider the father of modern geology. Live-action footage from the Tilt River in Scotland makes more vivid his contribution and importance. The discovery of glaciation and of plate tectonics in the 20th century is also explained and illustrated. <br><br> Part 2 shows a variety of earth scientists at work today. Program explains why their work is vital to the future of our planet.
    Modern Earth Science: An Introduction
    $69.95
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    		 The proud history of physics from Galileo to Einstein is surveyed in Part 1 of this 2-part program. Students will learn how physicists like Galileo and Isaac Newton radically changed our view of the universe in the Renaissance. And how physicists like Einstein, Curie and Bohr changed it again the the 20th century. In Part 2 students will meet some outstanding physicists working today. Included are interviews with Donald Huffman, the physicist who by serendipity discovered how to make buckyballs; Sally Ride, the physicist who was America's first woman astronaut; Don Eigler, the IBM physicist who was the first to move atoms one at a time; and more. <br><br> This is an interactive DVD. In addtion to the video program, the disc has guided questions and mastery quizzes to reinforce concepts recommended in the National Science Education Standards.
    Modern Physics: An Introduction
    $69.95
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    Learn about the different types of plants that exist in our world. In the process, discover the specific characteristics of monocots and dicots.
    Monocots and Dicots DVD
    $29.95
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    		 Scenes from the earth's major mountainous regions are shown. Informative diagrams explain the different ways in which mountains are formed.
    Mountain-Building Processes DVD
    $29.95
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    		 Mountains illustrate the work of major earth processes that are related to plate tectonics, such as igneous activity, faulting, and folding. Examples from major mountain ranges are supplemented by animated and still graphics.
    Mountains and the Forces that Build Them DVD
    $29.95
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    North America exhibits a dramatic variety of natural landscapes. Learn about eight major regions that are found on the continent.
    Natural Landscapes of North America DVD
    $29.95
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    		 Two videos, <i>Natural Resources</i> and <i>Natural Resources-Scarce or Plentiful?</i>, on one DVD. <br><br> <i>Natural Resources</i> In this two-part program students learn how gold and whale oil were once considered the most important natural resources. They will learn how the state of human technology and organization yesterday, today and tomorrow has a great deal to do with the abundance or scarcity of natural resources. Make sure your students hear and learn all sides of the controversial issues that make the headlines today. <br><br> <i>Natural Resources-Scarce or Plentiful?</i> The USA with less than 5% of the world's population consumes over a third of the planet's natural resources. Is this good or bad? Prominent scientists and environmentalists share their divergent views in this timely program.
    Natural Resources
    $79.95
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    		 The expertise of engineers is taking them into areas such as medicine, physical therapy, and seismology.
    New Engineers DVD
    $19.95
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    This up-to-date program brings knowledge and perspective to an emotionally charged subject. Includes video footage from Los Alamos, Three Mile Island, Oak Ridge and other centers of nuclear research. Program can help provide a base in science and history for discussion of nuclear power issues, including new developments in connections between energy production and global warming. <br><br> <i>Part 1. The History of Nuclear Power.</i> Tells the story of how nuclear power was developed in World War II and how it has come to be an important source of power (and controversy) today. <br><br> <i>Part 2. Nuclear Power Today and Tomorrow.</i> Helps the student understand the basic scientific principles involved in nuclear reactions. Includes pros and cons of nuclear energy in the future.
    Nuclear Power
    $59.95
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    		 Take a trip around the world and learn about such distinctive coastal characteristics as Norwegian fjords and Spanish rias. Tidal bores and reversing falls are also shown.
    Oceans, Coasts, and Tides DVD
    $29.95
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    		 Overpopulation, industrial pollution, and exploitation are threatening the forests of the world, and the people who depend upon them.
    Our Disappearing Forests DVD
    $19.95
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    The universe, filled with billions of stars, galaxies, and nebulas, has been ever-changing from the beginning of time. Learn about our planet and those with which we share our solar system. Award Winner: International Film & Video Festival Silver Screen Award for computer animation
    Our Solar System DVD
    $59.95
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    		 State-of-the-art computer graphics guide students through the Periodic Table. This video focuses on the Table's basic organization and discusses electron configurations.
    Periodic Table DVD
    $49.95
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    		 Two videos, <i>Energy and Society</i> and <i>Nuclear Power</i>, on one DVD. <br><br> <i>Energy and Society</i><br> Relying on evidence from the past as well as the present, this program explains how energy availability relates to economic growth and human progress. <i>Part 1. A Brief History of Energy and Society.</i> Traces the part played by energy throughout human history-muscle power to wind and water to fossil fuels to nuclear and solar energy and to large increases in efficiency today. <i>Part 2. Energy for Today and Tomorrow.</i> Explains basic concepts in energy science and offers insights into energy production and use for today and tomorrow. <br><br> <i>Nuclear Power</i><br> Helps bring knowledge and perspective to an emotionally charged subject. Includes video footage from Los Alamos, Three Mile Island, Oak Ridge and other centers of nuclear research. <i>Part 1. The History of Nuclear Power.</i> Tells the story of how nuclear power was developed in World War II and how it has come to be an important source of power and controversy today. <i>Part 2. Nuclear Power Today and Tomorrow.</i> Helps the student understand the basic scientific principles involved in nuclear reactions. Includes pros and cons of nuclear energy in the future.
    Physical Science: Energy and Nuclear Power
    $69.95
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    Two videos, <i>The Atom</i> and <i>Radiation</i>, on one DVD. <br><br> <i>The Atom</i><br> Knowledge of the atom is basic to all of the sciences. Use this program in any science course to help students learn what an atom is and what it means in human terms today. <i>Part 1. How We Found Out About Atoms.</i> Tells the dramatic story of humankind's search for the ultimate unit of matter. We begin in ancient Greece, and end with the 20th century revolution of Bohr, Einstein and Curie. <i>Part 2. What Is an Atom?</i> Gives the student a clear, dramatic picture of what we know and what we don't know about atoms today. <br><br> <i>Radiation</i><br> The world is made of atoms. The world is powered by radiation. Few subjects are so important and few so misunderstood. This live-action video will help students learn what radiation is, how it was discovered and what are the risks and the benefits of radiation today. <i>Part 1. How Radiation Was Discovered.</i> Students will learn how scientists like Newton, Young, Maxwell, Becquerel and Curie discovered basic facts about radiation. <i>Part 2. Radiation and You.</i> Students will learn facts and theories about radiation today, both the benefits and the risks.
    Physical Science: The Atom and Radiation
    $69.95
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    		 Three videos, <i>Energy on Earth</i>, <i>Resources on Earth</i> and <i>Ecosystems on Earth</i>, on one DVD. <br><br> <i>Energy on Earth</i><br> As the third millennium begins, earth relies ever more heavily on fossil fuel energy. This program helps students understand basic laws of energy flow, the importance of energy supplies for industrial civilizations, and the options for the new century. Stresses the importance of research into alternatives, including nuclear power, that do not add to global warming. <br><br> <i>Resources on Earth</i><br> 'A peasant must stand for a long time on a hillside with his mouth open before a roast duck flies in.' Chinese proverb. Resources are like that. To those who stand and wait, resources are few. To those who search and work, resources are plentiful. Use this program to help your students understand natural resources. <br><br> <i>Ecosystems on Earth</i><br> What is the state of earth's ecosystems as the 21st century begins? A primer on ecosystem problems and opportunities with the stress on new efforts to save endangered species, new efforts to avert global warming and new efforts to preserve and restore to health all ecosystems, including agricultural and urban ones.
    Planet Earth: Energy, Resources, and Ecosystems
    $79.95
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    		 Three videos, <i>Populations on Earth</i>, <i>Governments on Earth</i> and <i>Biotechnology on Earth</i>, on one DVD. <br><br> <i>Populations on Earth</i><br> Is the world overpopulated? Will population continue to explode in the coming century or will it level off as it did after the agricultural revolution? Students usually hear only one side of this important issue. Expert opinions are changing rapidly in the 21st century. This program presents many sides using new year-2000 video footage from China, India, Africa, Europe and the U.S. <br><br> <i>Governments on Earth</i><br> A survey of the diversity of governments in the year 2000 with special note of the explosive growth of democratic forms and the decline of authoritarian and totalitarian forms of government. Includes new video of progress in Russia, Germany, China and Cambodia and cautious hope for more improvements tomorrow. <br><br> <i>Biotechnology on Earth</i><br> The 20th century saw the earth dramatically changed by industrial technology. The 21st century will see the earth even more dramatically changed by progress in biotechnology and its handmaiden, nanotechnology. Urge your students to think instead of dogmatize about their future with the help of this comprehensive video.
    Planet Earth: Populations, Governments, and Biotechnology
    $79.95
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    Plant life probably began in Earth's oceans. Learn how plants have adapted to life on dry land. Characteristics of plants are discussed, as is the phenomenon known as 'alternation of generations.' The process of photosynthesis is explained and the role of vascular tissues in transporting nutrients is examined. Learn about the various divisions of the plant kingdom and understand what plants contribute to an ecosystem.
    Plant Kingdom DVD
    $49.95
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    		 This program follows one student through the process of preparing a science fair project. It includes everything from gathering materials and processing data to the eventual presentation at local and regional science fairs.
    Preparing a Science Fair Project DVD
    $59.95
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    		 Sight, sound, touch, taste, and smell; these five senses provide ways for people to experience and learn about things in their environment. Our senses also protect us from everyday dangers by sending information to the brain, which then instructs the body what to do in a hazardous situation. These senses are fragile, however, and if damaged, could result in permanent injury or a lifelong handicap. Learn why your senses are important, and what you can do to protect them.
    Protecting Your Senses DVD
    $59.95
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    Once covering about a fifth of the world's land surface, the species-rich rain forests now compose only seven percent, and the exploitation of these fascinating areas threatens the gene pool of the entire planet.
    Rain Forest: Treasure House of Biodiversity DVD
    $29.95
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    		 The meteorological classification of the ten genera of clouds, the processes that form them, and their roles as manifestations of weather are examined.
    Reading the Clouds DVD
    $19.95
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    		 This curriculum-oriented program offers a variety of definitions and examples to explain earth's river systems.
    Rivers and the Power of Running Water DVD
    $19.95
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    The practice of clear-cutting forests removes not only all of the trees, but also the ground cover and the animals that live there.
    Saving Forest Ecosystems DVD
    $19.95
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    		 An introduction to major science and society issues of the 21st century. Featured are five key issues of global importance today: Population, Natural Resources, Pollution, Genetic Engineering and Growth vs No-growth lifestyles. <br><br> Scientists, environmentalists and economists who give their views on these issues include: Bruce Ames, University of California-Berkeley; Richard Burgess, University of Wisconsin-Madison; Bernard Cohen, University of Pittsburgh; Richard Lindzen, Massachusetts Institute of Technology; Thomas Lovejoy, Smithsonian Institution; Amory Lovins, Rocky Mountain Institute; Howard Odum, University of Florida; Jeremy Rifkin, environmental activist; and Julian Simon, University of Maryland.
    Science & Society: Global Issues of 21st Century
    $69.95
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    		 One of democracy's most important allies is science. Learn in this new program how science (like capitalism and religion) is necessary for democracy but not sufficient. <br><br> The program traces the early history of both science and democracy in tribal societies on all continents. It stresses the importance of enduring ideas of western civilization that first arose in Greece, in Rome and in the Judeo-Christian tradition. Program explains how these ideas were profoundly modified in the western world's Renaissance, Reformation and Enlightenment when modern experimental science was born. Program explains why this is so important and often misunderstood today.
    Science and Democracy
    $69.95
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    Two videos, <i>Scientific Methods and Values</i> and <i>Women in Science</i>, on one DVD. <br><br> <i>Scientific Methods and Values</i><br> Most science textbooks and most science courses begin by discussing scientific methods and values. This program can make that introduction more vivid and meaningful. <i>Part 1. A Brief History of Science.</i> Traces the history of how scientific methods and values came to be. Includes visits to the homes and laboratories of Newton, Darwin, Curie, Lavoisier, Watson and Crick and other famous scientists. <i>Part 2. What Is Science?</i> Explains just what scientific methods and values are in a straightforward and eloquent way. <br><br> 'An excellent introduction to the nature of science and scientists. The set's pace is excellent, the narration is interesting and the illustrations are commanding. I highly recommend it.' Hans O. Anderson, past president of the National Science Teachers Association in AAAS Science Books and Films. <br><br> <i>Women in Science</i><br> The rapid growth in the number of women in science is one of the least noticed but one of the most important trends in science and society today. Part 1 traces the history of women in science. Included are sections on Marie Anne Lavoisier, Maria Mitchell, Caroline Herschel, Rosalind Franklin, Marie Curie and others. Part 2 features interviews with women working on the frontiers of science and technology today in academia and in industry. Included are a chemical engineer, a biochemist, a nurse-midwife, a physicist and America's first astronaut, Sally Ride, a microbiologist and a computer technician.
    Science and Society: An Introduction
    $79.95
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    		 The 'scientific method' provides a universal guideline for experimentation. Following a class experiment, students learn about the systematic measures used to achieve valid results.
    Scientific Method DVD
    $39.95
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    		 Investigate the forms and functions of seeds, stems, and roots, the components of each, and how we use them.
    Seeds, Stems, and Roots DVD
    $99.95
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    Embark upon a geographical exploration of our planet's seven seas. Learn their names and see where they are located.
    Seven Seas DVD
    $19.95
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    		 Over 3,000 teachers across the country have used this program in their classrooms and agree that it is something special. <br><br> Spaceship Earth has six parts. Connections to literature, philosophy and art are made vivid. Reviews in major educational media journals attest to the power of this classic program, revised to an all live-action version with closed captioning. <br><br> <i>Part 1: The Universe.</i> <br><br> <i>Part 2: The Biosphere.</i> <br><br> <i>Part 3: Living Things.</i> <br><br> <i>Part 4: The Cell</i> <br><br> <i>Part 5: Atoms and Molecules.</i> <br><br> <i>Part 6: A Little While Aware.</i>
    Spaceship Earth
    $89.95
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    		 Take your students inside James Thomson's laboratory at the University of Wisconsin where stem cells were first cultured to learn why this breakthrough is so important in the 21st century. This new 2007 updated DVD will help you show your students what stem cells are, how they are cultured, why they offer such potential for the future of our health and welfare. <br><br> The program addresses both the science and the ethical dilemmas that accompany this advance in biology. Includes interviews with pioneers in stem cell technology and in stem cell ethics.
    Stem Cells
    $69.95
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    Earth's surface is constantly reshaped by running water. Delta, alluvium, estuary, rill, arroyo, bayou, and oxbow lake are just some of the terms defined.
    Stream Systems and the Fluvial Process DVD
    $19.95
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    		 Change is a normal part of growth, but, for many, experiencing periods of change can be quite upsetting. As young people struggle to attain adulthood, strange feelings and strong desires may begin to overwhelm all rational thought. Knowing how and why events are happening can be a comfort during the process of growing to adulthood. The source of a great deal of teen turmoil may be traced to simple, natural chemical reactions within the body known as hormones.
    Teens and Hormones: Understanding the Endocrine System DVD
    $59.95
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    		 Global warming, ozone depletion and acid rain all make headlines and the evening news. In order to understand these and other global environmental problems, students need to understand what biologists call the biosphere. <br><br> <i>Part 1. A Brief History of the Biosphere.</i> How did the biosphere come to be? Traces the history of four billion years of the growth of the atmosphere and of changing life on planet earth. <br><br> <i>Part 2. The Biosphere Today.</i> Gives the student a clear, dramatic picture of the scientific concepts needed to understand the biosphere today.
    The Biosphere: Then and Now
    $59.95
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    Recommended for geography, science and social studies classes everywhere. An Interactive DVD with added questions and quizzes. <br><br> Part 1 recreates the dramatic story of how the Great Lakes were formed in the most recent ice age. Includes a section on Native Americans who lived here after the ice ages. <br><br> Part 2 tells the story of the voyageurs, lumberjacks, miners and pioneer farmers who settled and developed the Great Lakes country into what we know today. <br><br> Part 3 highlights case studies of current environmental problems and solutions. Includes an interview with Dr. Clifford Kraft, Sea Grant scientist in Green Bay, Wisconsin.
    The Great Lakes
    $69.95
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    		 Help your students learn why the Human Genome Project is revolutionary. The goal of the project (already achieved in rough form in 2001) is to decipher all of the genes in the human species, that is, to make public the detailed blueprints for making a human being. <br><br> This program takes you inside an automated gene sequencing laboratory where your students will learn how human genes are isolated, fragmented and how their DNA base sequences are determined. Controversial ethical issues are also addressed.
    The Human Genome Project
    $69.95
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    		 AAAS Project 2061 recommends that all students learn more about the history and culture of science. This classic program has been completely updated for use in the 21st century and is available on both videotape and DVD. <br><br> <i>The Soul of Science</i> tells the story of science and society on all continents, stressing the great turning points in the Renaissance and in the 19th and 20th centuries. <br><br> Part 1 features the birth of science in power and wonder with special attention to ancient Ionian Greece. <br><br> Part 2 follows the rebirth of science in the Renaissance when men like Galileo, Copernicus and Isaac Newton forever changed the way we look at the world and the universe. <br><br> In Part 3 students watch the scientific vision expand in Europe and into North America. They see the Industrial revolution born in England's midlands and sit with Charles Darwin as he writes On the Origin of Species by Means of Natural Selection <br><br> In Part 4 we move into the 20th century and the beginning of the 21st century when scientists like Einstein, Curie, Bohr, Crick and Watson led the way to the profound changes we see in our world of today.
    The Soul of Science
    $59.95
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    Students are often bewildered by news stories about the latest toxic waste hazards. With this popular program, newly updated in 2004, you can help your students better understand the science of toxicology. <br><br> <i>Part 1. A History of Toxic Wastes in the Biosphere.</i> Shows how the 'good old days' had serious toxic waste problems too. How they solved past crises gives clues for solving our toxic waste problems today. <br><br> <i>Part 2. Toxic Wastes Today.</i> Explains the basic scientific concepts needed to convert fear into intelligent action.
    Toxic Wastes: Then and Now
    $69.95
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    		 Atoms and molecules are the basic foundation of everything that exists. An atom is the smallest unit of matter that is recognizable as a chemical element, but atoms themselves may be broken up into smaller parts. Become acquainted with the inner structure of an atom and understand how each part of the atom has an essential function. Learn that molecules are groups of atoms that are held together by amazing chemical bonds. How these chemical bonds are formed will be explored, as students get a solid introduction to the building blocks of all matter.
    Understanding Atoms and Molecules DVD
    $49.95
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    		 Two basic video programs are combined on one interactive DVD to help students to a better understanding of atoms and of radiation. <br><br> <i>What is an Atom?</i><br> Gives students a clear picture of what we know about atoms today. <br><br> <i>Radiation and You</i><br> What is radiation? How was it discovered? What can it do to and for people today?
    Understanding Atoms and Radiation
    $59.95
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    This video offers a unique and witty look at the Mendelian Model of Inheritance, and at other basic concepts of genetics, as well.
    Understanding Basic Genetics DVD
    $59.95
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    		 Learn about the intricacies of the basic unit of life in this fascinating examination of cell membranes.
    Understanding Cell Membranes DVD
    $59.95
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    		 Become familiar with the various properties of light and learn how and why we see color.
    Understanding Color and Light DVD
    $79.95
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    Long-term drought and sudden rainstorms have produced exotic landscapes. A great introduction to the third of the earth that is arid or semi-arid.
    Understanding Desert Landforms DVD
    $19.95
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    		 State-of-the-art computer graphics guide the viewer through the world of deoxyribonucleic acid. Objectives include composition and structure, as well as replication. We'll also look at genetic expression through two stages of transcription and translation.
    Understanding DNA DVD
    $59.95
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    		 The areas of the earth with low amounts of annual rainfall maintain a fragile balance of life, a balance that human exploitation often tilts toward the side of permanent desertification.
    Understanding Drought and Desertification DVD
    $19.95
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    Different parts of the earth produce living conditions that nurture different kinds of plants and animals. The various ecosystems are explored, as are the relationships of entities within these ecosystems.
    Understanding Ecosystems DVD
    $59.95
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    		 Newton was the most eminent figure in the scientific revolution of the 17th Century. Learn about his many contributions and become familiar with scientific laws that he established.
    Understanding Newton's Laws DVD
    $69.95
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    		 The world is made of atoms. The world is powered by radiation. Few subjects are so important and few so misunderstood. This 2007 updated DVD will help students learn what radiation is, how it was discovered and what are the risks and benefits for people today. <br><br> <i>Part 1. How Radiation Was Discovered.</i> Students will learn how scientists like Newton, Young, Maxwell, Becquerel and Curie discovered basic facts about radiation. <br><br> <i>Part 2. Radiation and You.</i> Students will learn facts and theories about radiation today, both the benefits and the risks.
    Understanding Radiation
    $79.95
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    Travel into the interior of a cell by means of advanced computer graphics. Thanks to amazing microscopy, you can observe real cells as they interact. Understanding the Cell is a program designed to bring the cellular world to the student. Learn about the differences between prokaryotic and eukaryotic cells.
    Understanding the Cell DVD
    $59.95
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    		 This program explains basic metric units, as well as how to convert from one metric unit to another. In addition, conversion from English units to metric units and proper notation for expressing the metric system are discussed.
    Understanding the Metric System DVD
    $59.95
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    		 Our lives are affected by weather in innumerable ways. And, while weather is a force we cannot control, we can learn enough to predict its fury. This program explores the many factors that create the weather systems we experience every day.
    Understanding the Weather DVD
    $59.95
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    Types of volcanoes and the various effects that they have on the landscape are examined. Examples from around the world are provided. The information is thorough and exact. Learn everything you've always wanted to know about volcanoes!
    Understanding Volcanoes DVD
    $19.95
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    		 We live in a diverse world, but the diversity is meaningless unless students know where variations occur. This guide to maps and globes explains how to find any place on the Earth.
    Using Maps and Globes DVD
    $29.95
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    		 Explore various coastal regions around the world, and discover the forces that shape them. Examples and graphics explain the interaction of water and shorelines.
    Waves, Shores, and Beaches DVD
    $19.95
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    The forces at work on the land-sea interface are explained and illustrated with examples from around the world.
    Waves, Tides, & Currents: Shaping the Coastal Environment DVD
    $19.95
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    		 Natural forces work constantly at lowering high places and filling in low areas. Examine these gradational processes, and see how they relate to people and to environments.
    Weathering, Mass Wasting, and Erosion DVD
    $29.95
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    		 The wetlands are important to us and affect us in many ways. Discover why and how, and explore the different kinds of wetlands that exist in our world.
    Wetlands, Marshes, and Swamps DVD
    $19.95
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    Some bacteria cause deadly diseases, but without bacteria, life as we know it could not exist. This video introduces the two kingdoms of bacteria, Archaebacteria and Eubacteria, and explains how various bacteria in each kingdom live and reproduce. The viewer is offered graphic representations of bacterial structure, and is also given many microscopic glimpses into the bacterial world. Conjugation and binary fission are addressed, as is Alexander Fleming's discovery of penicillin. Learn what Gram staining tells you about bacteria, and discover the positive and negative aspects of bacteria in human society.
    What Are Bacteria? DVD
    $39.95
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    		 Energy can be converted from one form to another, but energy cannot be lost or destroyed. Learn many interesting facts about energy in this informative and entertaining video.
    What Is Energy? DVD
    $39.95
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    		 Photosynthesis is a biological process that benefits all living things. The chemical reactions that occur during the process of photosynthesis are described with the help of graphics and easy-to-follow explanations. This video makes learning about plants and how they function both fun and interesting.
    What Is Photosynthesis? DVD
    $59.95
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    While decrying the loss of rain forests everywhere, Americans seem to be nonchalant about the loss of their own native forests. Ecologists look at the alarming pattern of destruction.
    Whose Woods Are These? DVD
    $19.95
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    		 We'll examine climate, from the equator to the poles. Atmospheric processes, landforms, and vegetation of the earth's major climatic zones are explained in this two-part program. Human use of resources in the various climatic zones is considered.
    World Climate and Landscapes DVD
    $79.95
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    		 The volcanic process is explained in detail and then applied to some of the world's most famous volcanoes - Vesuvius, Paricutin, Mt. St. Helens, Stromboli, and the Hawaiian volcanoes.
    World Famous Volcanoes DVD
    $189.95
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    As the population crisis worsens, we are faced with the possibility that the earth may no longer be able to sustain such large numbers of people.
    World Population Problems DVD
    $19.95
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