All this week, we’ve been talking about how students are learning today, both in and out of the classroom. Our conversations have looked at cell phones as educational tools, and at whether college students are studying less now than they did forty years ago. Today, we take a closer look at the study habits of primary and middle school students. In the past several years, a growing number of parents, teachers, and researchers have argued that kids are being assigned too much homework. After eight hours in school, they wonder if studying for hours at home afterward is really necessary.