http://mindshift.kqed.org/2012/02/amidst-chaos-15-minutes-of-quiet-time-helps... I typically don't go for things like this. A little too touchy-feely for me. But I've been around enough kids to know that many of them don't have the luxury to just sit, in quiet, and not be bothered. Home is stressful. School is stressful. Sleep is hard to come by. Maybe a little quiet time at school goes along way towards feeling safe and in control.