For some kids, school is never out. As the long summer break ends for most students, about four percent of public schools are using a full year school calendar. Proponents say year-round learning, with short breaks throughout the year, helps stem the loss of math and reading skills over a long summer recess. But opponents say it can create scheduling conflicts for families with other kids not on the year-round schedule. We take a look at the pros and cons of disrupting the traditional school year.