This kit has been designed to fit the needs of resource centers and libraries. It's perfect for working with small groups of students with varying degrees of ability. Included are 6 sets each of addition, subtraction, multiplication, division, and fractions. for a total of 30 sets. You'll also receive the 4 correspond Wrap-up Rap audio cassettes, the Skip Counting video with audio cassette, as well as out Math Facts teaching manual, and all four of our new 32 page Math Mastery books.