Hmm, that seems like an odd way to represent how much recess time kids have. I'm not familiar with elementary schools, but I'd guess that class periods are some

Hmm, that seems like an odd way to represent how much recess time kids have. I'm not familiar with elementary schools, but I'd guess that class periods are somewhere between 30 minutes and an hour. The average kid is getting less than 30 minutes of recess time which seems to indicate that this average takes into account kids who don't get recess time at all. If recess periods for schools that have it are an hour long, then less than half of the kids actually have recess. Anyway, what a frustratingly useless statistic since I didn't know how they got it.