Scholars learn about the Hero's Journey as they read Ray Bradbury's "The Drummer Boy of Shiloh." They analyze the story's structure and narrative techniques. Finally, they write summaries of the text's central idea and use their...

This digital textbook covers core life science concepts and includes interactive features, real-world examples, and videos.

Article reports on the increasing size of ocean animals over the millenia. Includes a list of key vocabulary.

Discover how mass extinctions play a part in Earth's life history.

[Free Registration/Login may be required to access all resource tools.] The life cycle of a plant is very different from the life cycle of an animal. Humans are made entirely of diploid cells (cells with two sets of chromosomes). Our...

[Free Registration/Login may be required to access all resource tools.] Biodiversity is a measurement of the amount of variation of the species in a given area. More specifically, biodiversity can be defined as the variety of life and...

[Free Registration/Login may be required to access all resource tools.] Do you ever wonder why some birds are big like ostriches and some birds are small like robins? Or why a lion has a mane while a leopard has spots? In the 19th...

[Free Registration/Login may be required to access all resource tools.] Fossils are the preserved remains of animals, plants, and other organisms from the distant past. By studying fossils, evidence for evolution is revealed....

Mummies have always played a part in nightmares for Western cultures, but in ancient Egypt, mummification was a serious religious ritual. They believed that preserving human remains was necessary so that the previous owner could enjoy...

The oceans are a precious natural resource, part of Earth's carbon cycle. But what happens if the oceans absorb too much carbon dioxide? Many scientists are concerned that the increased absorption of carbon dioxide is causing them to...

To survive, we need oxygen in the air we breathe. Oxygen is also essential for most aquatic organisms, but there is much less oxygen available in water than in air. Learn how to measure dissolved oxygen and then see how oxygen...

In this science fair project you will learn about biomes and how different climatic conditions affect plant growth. This can explain why some plants and animals are similar in different areas of the country, and in other parts they are not.

Review the safety precautions while performing scientific investigations.

Understand the history of the Earth through geologic time.

[Free Registration/Login may be required to access all resource tools.] Plants are producers, which means they are able to make their own food, as well as "food" for other organisms. Plants are also autotrophs - they collect energy from...

Learn how energy is transferred along a food chain.

Understand Earth's biosphere which contains the lithosphere, hydrosphere, and atmosphere.

Learn about land biomes and their ecology.

Explore the structure and function of the lymphatic system.

Learn how some renewable resources contribute to alternative energy sources.

Understand water as a limited resource, and how it becomes polluted.

Learn about the human body's immune response to pathogens.

Understand the female menstrual cycle.

Learn about the dangers of sexually transmitted infections.