Like math? Like puzzles? Then meet Bojagi, a game created by David Radcliffe (@daveinstpaul). It looks simple enough. A grid has a few numbers in it. The goal is to draw a rectangle around each number ...

Last year in third grade, we thought our son, Jared, learned his times tables. Now in fourth grade, he's struggling in math. His teacher says he hasn't developed "automaticity" and suggests drilling ...