American Chemical Society
Teachers and Students section includes links to articles, professional associations and k-12 and higher education resources.

Bio Ed Online
Award-winning resources site for biology teachers from Baylor University.

Energy Kids
A student-friendly Web site by the U.S. Department of Energy, Energy Information Administration (EIA).

EPA Teaching Center
Lesson plans and activities from EPA and other sources, as well as information about grants, awards and professional development.

Molecular Workbench
Offers a "molecular simulation engine" -- a set of tools that can be used to compute and visualize the motion of atoms and molecules. Thirty-five activities include how hot air balloons work, how superballs are like atoms, what matter is made of and ""rainstorm in a bag.""

NASA Education
Teachers can search for free materials by keyword, grade level, type and subject.

National Association of Biology Teachers
Publications and information on grants and professional development opportunities.

Planet Quest
This search for new worlds is being conducted over the next 15 years through a series of NASA missions  using the most sensitive instruments ever made.  Find out about these instruments & missions.  Learn how scientists discover planets and determine whether a planet is habitable.  Resources for teachers & learning activities for students are provided. (NASA)

Scientific American
Science education news.

Sunspots & the Solar Cycle
This NASA site explains the solar cycle, how sunspots affect earth, the history of sunspots and more.

Science Education at Jefferson Lab
Offers 16 hands-on activities to answer questions such as: How do scientists to measure the size of an atom?  What kind of coat will keep you the warmest -- one made from cotton, steel wool or air?  How should you build a boat so that it carries the most cargo? Flash cards, matching games, & crossword puzzles can help students learn the periodic table of elements & other science information.  Middle school teachers are invited to apply for a summer enrichment program in basic physics.  (From the federal Dept. of Energy)

Teachers Domain
A digital library of multimedia for life sciences -- ecology and ecosystems, evolution, adaptation, genetics, the cell and more. Includes more than 150 broadcast clips and video modules from WGBH television science programs. (Funded by the National Science Foundation. Site requires a free registration.)

An interactive guide to toxic substances commonly found in water, rivers, offices, stores, schools, parks, homes and factories. (From the National Institutes for Health and federal department of Health and Human Services)