10 minutes per grade level is actually the rule of thumb that's taught in many education programs and is advocated by the NEA (a national teachers' union). Some

10 minutes per grade level is actually the rule of thumb that's taught in many education programs and is advocated by the NEA (a national teachers' union). Some longitudinal research has borne this out. Whether it actually happens or not, I don't know. Research: http://rer.sagepub.com/content/76/1/1.abstract http://rer.sagepub.com/content/76/1/1.abstract Press info on research: http://today.duke.edu/2006/03/homework.html http://today.duke.edu/2006/03/homework.html