Paige Martin once tried to smuggle her iPod into class, hiding the tiny earbuds beneath her shirt's hood and enjoying a bit of the Dave Matthews Band before a math teacher confiscated the device. Today, the Glenbrook North High School senior in Northbrook, Ill., still must tuck her iPod away during class, but she no longer has to sneak through the school hallways.

Schools and iPods: As Some Tune Out, Others Tune In