Now picture the following:
"Show me how big you can be," encourages the teacher, voice and face alive with enthusiasm. Eight children scramble to respond. When they're ready, three are standing with feet apart and arms out to their sides. One is in the same position but lying face down on the floor. Two children are lying face up. And two are sitting with arms out to sides and legs straddled. "Look at all the different possibilities!" the teacher exclaims. "Nathan, Anthony, and Jamal are big standing up; Mariah is lying on her tummy; and Kara and Michael are!