A bedtime story is a longtime tradition. What about a math, science or history quiz, though? George Marks/Getty Images hide caption

itoggle caption George Marks/Getty Images

Two students walk in front of Stanford Memorial Church on the Stanford University campus in Stanford, Calif. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

Kimberly Payton, a teacher at the Small Savers Child Development Center, reads to a group of preschoolers in Washington, D.C., in 2010. Researchers say that teachers who make small changes in how they read to 4-year-olds can improve kids' reading skills later on. Ricky Carioti/The Washington Post/Getty Images hide caption

itoggle caption Ricky Carioti/The Washington Post/Getty Images