Many homeschoolers and quite a few elementary school teachers feel unprepared to teach science and math. I believe that this is in large part because they have no idea where to obtain the materials necessary to teach labs. I have dealt with two very large companies, who although their primary purpose is to supply schools, will sell to individuals. However, neither one will sell either chemicals or live bacteria and viruses. These two are: Ward Science Supplies and Carolina Biological. Don't be fooled by the name. Both sell materials to teach: biology, geology, meteorology, astronomy, chemistry, physics, and math from kindergarten through graduate school. A third company, Home Science Tools, sells primarily to homeschoolers. They will provide chemicals in the very small quantities that a homeschooler would wish. They also have many wonderful kits for teaching chemistry concepts.
I also have a site at Blogger. That site has information about teaching music and art. My Google Pages have information about teaching math and science, history, literature, reading, writing, and grammar. Why multiple sites? First, Blogger and Google Pages are similar in some ways and very different in other ways. Some things are much easier to do at Blogger; other things are far easier to do at Google Pages. The other reason for multiple sites has to do with storage space limits.
Margaret Mc Kinney