Science World - [ Kids ] - Interactive world includes simple science fair projects, short biographies of inventors, an introduction to the planets, and a timeline that identifies important dates.

Kid's Domain: Science Games - [ Kids/Teens ] - Features a large selection of animal, ecology, space, and dinosaur games.

Propane on the Brain - [ Kids ] - Experiments, games and safety tips for kids in grades K-8.

Discovery Kids - [ Kids/Teens ] - Delivers informative articles, online games, a chat room, online science games, live web cams, showcase of video clips, and a station guide.

Paper Online - [ Kids/Teens ] - Educational resource includes history of paper, discusses what paper is and has instructions to make your own paper.

Oakland Museum of California - [ Teens/Mature Teens ] - Museum specializes in the natural science, history and art of the Golden State. Contains current exhibitions, permanent galleries and projects.

Girls Reaching Out With Science - [ Teens ] - Pairs middle school girls in Columbus, Ohio, with mentors at Capital University to study science.

Science for Families - [ Kids/Teens/Mature Teens ] - Original articles, Internet science library, forum idea exchange, book and product profiles, projects, and experiments.

The Yuckiest Site on the Internet - [ Kids ] - Educational science entertainment about yucky things such as worms. Club Yucky, games, and recipes.

The Adventures of Echo the Bat - [ Kids/Teens ] - Follow Echo the Bat through the eyes of a satellite as he migrates through Arizona. Topics include false color satellite imagery, how scientist use these images to study habitats, and the electromagnetic spectrum. Interactive adventure game and activities for the classroom.

Pfizer FunZone - [ Kids/Teens ] - Explore activities and articles about scientists while learning about many science topics.

Kids and Science - [ Kids/Teens ] - E-community for discovering science in main themes around us. Includes projects and facts, as well as games and fun.

Schoolscience National Curriculum Science - [ Kids/Teens/Mature Teens ] - Written for teachers and students of National Curriculum science in the UK. Covers some biology, chemistry, and physics topics. Well illustrated. Includes some quizzes.

How a Galileo Thermometer Works - [ Kids/Teens/Mature Teens ] - Illustrated tutorial explains the operation of the Galileo thermometer.

The Christopher Columbus Awards - [ Teens ] - Competition open to students in grades 6, 7 and 8. Three or four students work as a team to identify a problem in their community, research it, and use science to develop an innovative solution.

Discovery School: A-to-Z Science - [ Kids/Teens ] - Offers homework help, articles, interactive activities, virtual tours, science fair ideas, and projects for kids.

Science Made Simple - [ Kids/Teens ] - Kids get simple, detailed answers to common science questions. Plus great science projects and experiments, science news and interactive unit measurement conversions.

Wonderville - [ Kids ] - Zoom around this 3D city playing games and learning about science.

Athena - [ Kids/Teens/Mature Teens ] - Illustrated descriptions and activities on Earth Science and Space. Includes links to related materials and suggested learning activities.

Ask Dr. Universe - [ Kids ] - All sorts of big and small questions are answered here, and include things that puzzle kids worldwide.

Science News for Kids - [ Kids/Teens ] - Experiments to do, articles to read, science fair projects, puzzles, and games.

Ingenious: Seeing Things Differently - [ Teens/Mature Teens ] - Find debates, photographs, and articles that create insights into science and culture. Offers the opportunity to personalize image collections, web galleries, and e-cards.

Alaska Science Forum - [ Teens/Mature Teens ] - Groups of articles on a wide array of topics, like volcanos, geology, living in the North, bugs, weather, and pets. Lots of weird facts.

How Stuff Works Express - [ Kids/Teens ] - Offers fun and informative articles about research and extraordinary people. Also includes information on hot sites, cool books, internet projects, and experiments. Includes teacher support materials.

Museum of Science and Technology - [ Kids/Teens/Mature Teens ] - Offers online exhibits, games, research topics, and tips for kids.

Patent Café - Discovery Café - [ Kids/Teens/Mature Teens ] - Directory of kid-safe invention, science, discovery and innovation resources for K-12 kids, teachers and parents.

Scientific Topics - [ Teens/Mature Teens ] - Contains tutorials covering physics, chemistry, sea battles, minerals, china, airplanes and philosophy.

The Why Files - [ Kids/Teens ] - Explores the science behind the news such as why planes crash, how new diseases break out, and why athletes shouldn't use drugs.

Strange Matter - [ Kids/Teens ] - Explore the world of materials science. Investigate structure, properties, processing and performance to discover the secrets of everyday stuff.

Adventures in Science and Technology - [ Kids ] - Introduces chemistry, physics, biology, engineering, and computer science. In English and French.

Questacon - [ Kids/Teens/Mature Teens ] - The National Science and Technology Centre in Australia presents free games, quizzes and activities to explain science to children and teenagers. Includes fun experiments to try at home, as well as movies and pictures about current exhibitions.

Careers in Life Science Information for Students - [ Mature Teens ] - Links to sites offering information about various science careers, mostly in the life sciences, but also including astronomy.

Activities and Quizzes on Science - [ Kids/Teens ] - Activities, games, and quizzes on a variety of science topics. Wonderful study aid for children aged 9-13.

Magi Early Eastern Philosophers (And a Great Poet) - [ Teens ] - Introduction to contributions by Al-Khwarismi, Al-Kindi, and Omar Khayyam in the fields of mathematics, astronomy, medicine, and optics. Period of time discussed is from around 680 AD to 1120 AD in the present day Middle East.

Funky Lab - [ Kids/Teens ] - Presents a mix of science information and activities, from toilets to steam engines. Includes quizzes, games, videos and articles on the science and the history of science.

ScienceInTheBox - [ Teens/Mature Teens ] - About the science behind Procter and Gamble's laundry and cleaning products. Research and development, safety and sustainability issues.

Terrific Scientific - [ Teens/Mature Teens ] - Learn about the science of everyday life by following fun experiments and simple explanations. Submit your own ideas and experiments for inclusion.

History Of The Universe - [ Kids/Teens ] - A short history of the universe, earth, life, explained in simple terms. Begins with the big bang theory and ends with the computer age.

TryScience.org - [ Kids/Teens ] - Features virtual field trips, virtual experiments and other interactive activities supplied by science centers around the world.

The Field Museum's Women in Science - [ Teens/Mature Teens ] - Contains thirteen interviews with women in different areas of science.

The Flying Turtle - [ Kids/Teens ] - Illustrated site celebrates and explains the basic scientific principles that govern both nature and human technology.

NIH Office of Science Education - [ Kids/Teens/Mature Teens ] - Life science education resources for students, teachers, and the general public.

How Stuff Works - [ Kids/Teens/Mature Teens ] - Articles explain how hundreds of things work, from elements of the human body to space-age technology.

Bill Nye the Science Guy - [ Kids ] - Check out the daily demo, watch a video clip or listen to an audio clips, and learn more about Bill Nye himself.

The World of Agnes Pflumm - [ Teens ] - Official site for the Agnes Pflumm science education novels. Includes lesson plans, science project help, integrating science and art, links science and literature, and book information. Also includes tips for kids about time management.

Explain that Stuff - [ Teens/Mature Teens ] - Includes articles about science and technology, including space, computing, and nuclear power.

Kinetic City - [ Kids ] - A science radio show for kids, updated weekly. Keep up with the latest adventures of the Kinetic City Super Crew and do your own science experiments at home.

Who Wants to Win a Million Dollars? - The Science Game - [ Kids/Teens/Mature Teens ] - Test your knowledge of math and science as you work your way to the million dollar level. Although the questions are real, the money, unfortunately, is not.

Exploratorium Science Snacks - [ Kids/Teens ] - Miniature versions of some of the most popular exhibits at the Exploratorium.

Ontario Science Centre: Science Zone - [ Kids/Teens/Mature Teens ] - Dozens of interactive science activities focus on topics ranging from the human body to computer science.

The Paper Project - [ Kids/Teens/Mature Teens ] - Learn about the simple process of making paper using plants or natural cloth. Page includes illustrations to show the method.

The Bubblesphere - [ Kids ] - All about soap bubbles. Bubble blowing, solutions, history, fun, Java games, bubble machines and trivia.

X-Ray for Kids - [ Kids ] - Information geared to children about x-rays and interesting x-rays of plants, shells, animals.

The Black Hole Gang - [ Kids ] - Learn about the science adventures of Matt, Wei Ling, Rosa, A.J., and Newton. Designed as a resource for kid-friendly science on the web.

Skytopia - World's Most Unanswered Science Project - [ Teens/Mature Teens ] - Collection of science questions relating to physics, chemistry, sound, music, color and light.

A Science Odyssey - [ Teens/Mature Teens ] - Presents the people and the discoveries of 20th century science and technology in a variety of accessible, and interactive Web features. Based on the PBS television series.

Cool Science - [ Kids/Teens ] - Energy-related science information for kids -- plus resources for teachers. Includes 'Ask a Researcher' feature.

Science Inside Out - [ Mature Teens ] - News, information, quizzes and lecture notes from the Royal Institution, United Kingdom. Includes a list of events for schools.