Shoe Box Learning Centers Addition Subtraction - Shoe Box Learning Centers Author:Jacqueline Clarke Enrich center time with easy-to-make-and-store "kits"! These 30 skill-building games and activities help kids practice fact families, solving word problems, using money, and more. Each box can be assembled with readily available materials and includes reproducible labels, easy-to-read student directions, and reproducible game boards and workshee... more »ts. Meets the NCTM Standards.« less