Bookshark level B science package, recommended ages 6-8. includes all the reading books, instructors guide, experiments guide, experiment worksheets (missing weeks 1-3, 5, and 18), and experiment supply kit (should be the full kit, I dont think we used anything from it). the only thing you would need to purchase is the worksheets that go with the reading books. all books in great condition. the instructors guide sheets have pencil marks on them, easily erased.