Everybody knows that worms are good for the soil, but not everybody knows why. Here's a project that investigates just one of the ways earthworms improve the earth.

Choose and plant your seeds, and then give them everything they need to grow in this interactive garden.

All about plants has information on plant parts--seeds, flowers, fruits, roots, and spores--and plant processes--seed dispersal, germination, pollination, and photosynthesis. You can also take a tour of this Los Angeles-based...

3rd grade students in Springfield, Massachusetts created this field guide as part of a learning expedition on ecosystems and pond life. Students did fieldwork in the city park and worked with local experts, closely examining the ponds....

A chart summarizes the sizes, physical features, plant and animal life, and special facts of a selection of the world's cold deserts, including Antarctica, the Gobi, and the Great Basin Desert in the western United States.