chemistry
Spark Labs: How to make bio-plastic
From the Smithsonian Institution, here are instructions to make bio-degradable plastic with safe ingredients you're likely to have around the house. The pdf includes a brief history of plastic, and links to learn more.
CK-12: Free, quality math and science curriculum
This site features textbooks in a flexible format called "Flexbooks" available for free download and printing. Most programs include a Teacher's Edition, workbooks, and other supplementary material, all for free. The topics at the moment include middle school and high school level math and science. The science is mainstream (evolution is included in Life Science and Biology programs). The Chemistry course includes labs. The math is fairly traditional and includes Algebra, Geometry, Trigonometry, Probability & Statistics (AP), and Calculus (AB). Free S
Seeds of Science/Roots of Reading - Strategy guides for grades 2-5
Seeds of Science/Roots of Reading is an integrated reading and science curriculum for elementary school classrooms designed by the Lawrence Hall of Science at the University of California. The complete curriculum is not available to homeschoolers, but "strategy guides" are available online for free. The strategy guides are lesson plans for teaching reading, text analysis, and research skills along with science via 63 different books, from relatively simple picture books to reference books.
The Periodic Table of Videos
A collection of funny, informative videos about each of the elements of the periodic table. Produced by the University of Nottingham. One of those wonderful sites that has a little something for everyone, from early elementary aged kids through adults. (To visit the site, click on the thumbnail above.)
The Works Homeschool Day: Invisible Ink
What is thymolphthalein? It's a chemical with the interesting ability to make words disappear. Come try it out and discover the science of acids and bases.