This is part of the TOPS series. It contains experiments you can do with stuff you have around the house. They're top-notch experiments, with great explanations of what the student is seeing. AND each experiment has a little lab sheet for the student to fill out, so for those homeschoolers in states requiring portfolios, you've got one to show for every experiment you do! And for teachers, they're reproducible, so you can use them for every student in your class! Just great. A lot of schools and homeschoolers use these for both science & math.