The Associated Press: More school: Obama would curtail summer vacation
That makes poor children almost totally dependent on their learning experience at school, said Karl Alexander, a sociology professor at Baltimore's Johns Hopkins University, home of the National Center for Summer Learning.
Disadvantaged kids, on the whole, make no progress in the summer, Alexander said. Some studies suggest they actually fall back. Wealthier kids have parents who read to them, have strong language skills and go to great lengths to give them learning opportunities such as computers, summer camp, vacations, music lessons, or playing on sports teams.
"If your parents are high school dropouts with low literacy levels and reading for pleasure is not hard-wired, it's hard to be a good role model for your children, even if you really want to be," Alexander said.