Each CD helps children master their math facts by setting them to rap music. The rapping is light, cheery, and clearly enunciated rather than the driving, pounding style we usually associate with rap. The math facts are presented in order with transition rhymes between each table. Multiplication facts are sung through the twelves, addition through sums of eighteen, and subtraction to eighteen. Division teaches the concept of division on one side, then drills the facts on side 2. The 24-page activity books contain puzzles, brain teasers, and other activities, plus lyrics to all songs.