National Geographic's interactive site that lets you explore volcanoes, earthquakes, hurricanes and tornadoes.

Fun learning activities using everyday objects.

Science in the Classroom is a collection of freely available annotated research papers to help educators and students understand the research contained in scientific literature by providing accompanying teaching materials and by using annotations that include vocabulary, methods, descriptions of prior research, and explanations of major conclusions.

Science NetLinks offers lesson plans, videos, interactives, podcasts, news, hands-on activities, special resource collections and after-school activities for K-12 teachers and students.

"See how the plants we tend feed our bodies, our minds and our senses." Includes interactive activities and videos.

Over 400 projects to browse, download or read, in the categories of: animals, astronomy, atoms, ecology, gases, geology, liquids, meteorology, microorganisms, oceanography, plants, solids.

"A light-hearted video production that answers common questions about how the human body works. Segments generally run one minute."