I’ve outlined the problem and done some preliminary investigation regarding materials for chemistry after we finish the ten-week Real-Science-4-Kids pre-level-1 course. Now I’m ready to go out on a limb, forming and testing a hypothesis as to what the best choices are. Here’s what I’ve decided on: This one has over 100 pages of chemistry information and includes a number of supplemental internet resources. It’s paperback, which is a little disappointing (though I’m sure it’s more affordab