The secret life of the brain
This web site was developed to accompany the PBS television series The Secret Life of the Brain, which explores how the human brain develops and changes from infancy through late adulthood. Among the site's features are a timeline of human knowledge of the brain, an interactive three-dimensional brain model, and illustrated descriptions of various brain scanning techniques. There are also sections devoted to each episode of the TV series that provide an overview of the episode, brief video clips
Ecological Footprint: The Role of Technology
In this two-minute sound segment, the director of the Sustainability Program for the public policy group Redefining Progress discusses the concept of ecological overshoot. He reminds us that today we use more than what nature can regenerate, and that as long as we use more, we are depleting the natural capital and liquidating our most essential assets. This site is from an archive of a daily radio program called Pulse of the Planet, which provides its listeners with a portrait of Planet Earth, t
The Earth's Orbit
These eleven activities relate to the results of the motion and position of the Earth in its orbit, investigating both the causes and the effects of changing seasons. It starts simply by trying to quantify the observation that it is colder in the winter and ends by measuring the tilt of the Earth. This is chapter two of the online book Eyes on the Sky, Feet on the Ground, containing explorations into astronomy as a classroom tool for learning how to theorize, experiment, and analyze data. The ac
In this workshop session, elementary and middle school teachers explore scale drawing, similar triangles, and trigonometry in terms of ratios and proportion. Besides explanations and real-world problems, the unit includes video segments that show teachers investigating problems of similarity. To understand the ratios that underlie trigonometry, participants use an interactive activity provided online. This is session 8 of Learning Math: Geometry, a free online course.
Platonic solids, duals (grades 6-8)
Using this virtual manipulative, the student can examine the dual relationship among the five platonic solids, each a polyhedron with identical regular polygonal faces. Every platonic solid has a unique platonic solid that fits inside it, with its vertices at the midpoints of the original solid. The student can manipulate, color, and change the size of each solid. A transparent mode is available for viewing the outline of each polyhedron and its dual. Instructions for using the applet and inform
Coloring multiples in Pascal's triangle
Teachers can assign this applet and discussion materials to small groups to help students visualize number patterns and develop understanding of Pascal's triangle.
This two-minute radio program features sound clips of infant and adult storks together with a commentary on these two distinct animal sounds. An environmental official from Hungary, where the majority of white storks live during the spring and summer, describes the function of the noises made by chicks and adult storks. He also discusses the instincts exhibited by adult pairs when they are raising baby storks. The archived program, part of the Pulse of the Planet radio show, is available here in
Native American geometry
This website focuses on Native American use of the physical, proportional geometry that originates from the simple circle. Aimed at 4th to 9th grade teachers, the site is divided into four sections: foundations, anthropology, designs, and education. It was selected by Britannica.com, February 2000, as a best Internet site. Other keywords: geometric shapes, geometric constructions, proportional geometry, proportional constants, polygons, hexagons, equilateral triangles, dodecagons, squares, octag
Examine the sun at different wavelengths
This Earth science resource enables students to observe and compare the sun's appearance under different types of electromagnetic radiation. Students are instructed to move the cursor across the spectrum to see images of the sun under radio and microwaves; infrared, visible, and ultraviolet light; and gamma rays. Each image includes a label that indicates the portion of the electromagnetic spectrum, the wavelength in angstroms and meters, and the layer of the sun in view. Copyright 2005 Eisenhow
Examine video clips of erupted materials
This Earth science resource presents students with four video clips from eruptions of Kilauea, a Hawaiian volcano. Each clip features a different type of lava flow. A sentence is included with each clip to describe the erupted material that is displayed. The clips feature solidified basalt on top of lava, lava flowing down over rocks, a lava fountain, and lava with low viscosity. Students are able to use control buttons to play, pause, and step through all four video clips. Copyright 2005 Eisenh
Mortality rate of captive-bred and released carnivores is 70%
This January 25, 2008 entry in the NSDL Expert Voices blog Connecting News with National Science Education Standards deals with survival rates of captive-bred carnivore released into the wild. It points to modifications breeders should make to decrease mortality rates. Additional links to teaching resources related to populations, ecosystems, and diversity are provided
Frequently Asked Questions: Questions About Paleontology
This site asks and answers questions about paleontology, fossils and dinosaurs. Paleontology questions are: What is paleontology? How does paleontology differ from anthropology and archaeology? What are the practical uses of paleontology? How do paleontologists know how old their fossils are? What training is necessary to become a paleontologist? What organizations exist for paleontologists?
Ready to Teach (RTT) interactives library
This web site offers access to four interactive software tools designed to help teachers and students of algebra visualize and experiment online with key concepts related to linear and piecewise functions. Copyright 2005 Eisenhower National Clearinghouse
About Basic Geometry
Who developed basic geometry? What is it used for? Who uses it?
Science Friday Online!
This is an online companion to Science Friday, a weekly science, technology, and environment news radio program. The site includes articles about the weekly program, video, and blog links. A podcast of the program is also available.
Create a Graph
Students will learn how to create area, bar, pie, and line graphs. They are provided with information about what each type of graph shows and what it can be used for. Students are given an example of each type of graph, but they can create graphs using their own data in the interactive tool.
Weather in Antarctica
This homepage includes information about the weather in Antarctica and links to pages on the climate, wind chill, clouds, snow and ice, and pressure and storms of Antarctica. The current weather conditions updated automatically at various stations are also provided.
Blue Planet: Frozen Seas
In this lesson, students research the behavioral and physical adaptations of an animal from the Arctic or Antarctic; and create a poster and make a presentation about the animal.
Atlas of the Cyrosphere
This site from the National Snow and Ice Data Center (NSIDC) allows visitors to explore and dynamically map the Earth's frozen regions. Viewed from a polar perspective, the available data sources include snow cover, sea ice extent and concentration, glaciers, ice sheets, permafrost, and other critical components of the Earth's cryosphere. Users can zoom in to a specific region on the Earth as well as overlay country borders, major cities, and other geographic information. This site provides a ge
This easy to read page includes a biography of Chadwick who discovered the neutron, a photo of Chadwick and links to related people such as Rutherford.