Homework

This comports with my experience and observation:

After over 25 years of studying and analyzing homework, Harris Coopers’ research demonstrates a clear conclusion: homework wrecks elementary school students. In his book, The Battle over Homework: Common Ground for Administrators, Teachers, and Parents, the homework guru gives details about the relationship between homework and success at different grade levels. While homework has a significant benefit at the high school level, the benefit drops off for middle school students and “there’s no benefit at the elementary school level,” agrees Etta Kralovec, an education professor at the University of Arizona.