... as a learning mechanism, that is.
From: The Truth About Homework:
I discovered that decades of investigation have failed to turn up any evidence that homework is beneficial for students in elementary school. ...The only effect that does show up is more negative attitudes on the part of students who get more assignments.
In fact, more hours are least likely to produce better outcomes when understanding or creativity is involved. Anderson and his associates found that when children are taught to read by focusing on the meaning of the text (rather than primarily on phonetic skills), their learning does “not depend on amount of instructional time.” In math, too, as another group of researchers discovered, time on task is directly correlated to achievement only if both the activity and the outcome measure are focused on rote recall as opposed to problem solving.
Lots of practice can help some students get better at remembering an answer, but not to get better at – or even accustomed to -- thinking. And even when they do acquire an academic skill through practice, the way they acquire it should give us pause. As psychologist Ellen Langer has shown, “When we drill ourselves in a certain skill so that it becomes second nature,” we may come to perform that skill “mindlessly,” locking us into patterns and procedures that are less than ideal.