Teach math skills with base ten blocks by using these double-sided cards. The front of the card provides objectives, resources needed and the procedure. The back offers visual examples. Topics include counting, subitizing, problem solving, ordering, grouping, Ty numbers, place value, estimation, addition, trading, subtraction, doubling, halving, multiplication, squares, division, remainders, prime numbers, measure, volume, surface area, percentages, decimals and factors. 50 activity cards, plus a contents card that can act as a checklist. For ages 5 and up.