After they have had a chance to think about and have yelled out some more answers ask them how many squares there are in a 1x1 grid (1) and in a 2x2 grid (the 4 small squares and the 1 big square = 5) and a 3x3 grid (9 small squares, 4 of the 2x2, and 1 big one = 14). So the total for a 4x4 is 16 + 9 + 4 + 1 = 30.May 18, 2011read more >>