This looks like a WONDERFUL approach to high school chemistry, at least for a semester! What a unique and very hands-on approach! Complete website including how the author structures his college-level course with this book.
a site I came across appropriate for upper grade levels, an abundance of information here from the compound library, to quiz's,interactives, articles, glossary, a great resource for chemistry
Videos of experiments you can't do at home, interactive games (mostly drill with simple graphics and no audio), a glossary, and science answers section.
You can access the material even without giving them your email. Not all areas have been completed. Even though it says K-12, I don't see high school material.