NYTimes.com: The Trouble With Homework

"Spaced repitition" (returning to a suject briefly and repeatedly)and "retrieval practice" testing, and "cognitive disfluency" (if hard to learn signals brain to retain it better) can improve knowledge retention. OPINION   | September 11, 2011 Opinion:  The Trouble With Homework By ANNIE MURPHY PAUL The quality of homework matters more than the quantity.  Here is a link if you don't subscribe to New York Times or you aren't in a Starbucks.