So how will your kids spend this summer? Building sand castles at the beach? Swimming at summer camp? Shedding I.Q. points?

In educating myself this spring about education, I was aghast to learn that American children drop in I.Q. each summer vacation  because they aren’t in school or exercising their brains.

This is less true of middle-class students whose parents drag them off to summer classes or make them read books. But poor kids fall two months behind in reading level each summer break, and that accounts for much of the difference in learning trajectory between rich and poor students.

A mountain of research points to a central lesson: Pry your kids away from the keyboard and the television this summer, and get them reading. Let me help by offering my list of the Best Children’s Books  Ever!