Real Science for Kids - Focus On Middle School Chemistry by Rebecca Keller, Phd. This is a used set in very good condition. Includes Teacher's Manual and Student Text, Grades 5-8. Retail value is over $50 for the two books. I am asking $25 for this like new set. That price includes Media Mail shipping within the continental US. You will need the Chemistry Laboratory workbook (consumable) to go with it.