The Calculadder 2 workbook includes 12 copies each of Levels 17 to 32 of the Calculadder drills plus Guide, QuicKeys and Achievement Record. The drills cover all the basic addition and subtraction facts that kids should memorize. These drills have 3 or 4-minute time goals. The cover multi-column and multi-digit addition and subtraction with carrying and borrowing plus multiplication tables through 9. Successive drill Levels review earlier material while introducing new facts.