Two Green Bay, Wis., teachers studied the behaviors of boys and girls playing basketball and put that research to use. They teach single-sex classes at an elementary school and modify their approaches to suit the learning styles of boys and girls. The teachers' methods are based largely on what they learned about the communication styles of each group. "In basketball, even if a boy is awkward and maybe needs social development, the other boys will still rally behind him. But with girls, if I don't like you, you aren't getting this ball," teacher Kelly Schweda said.