Sorry for the spamming, just wanted to stir things up a bit here in the pedagogy realm: I suggest reading the entire article although here's a snippet. (and i think parallels can be drawn with physical activity) http://www.alfiekohn.org/teaching/nonreaders.htm Just one quick comment. Tje studies I was shown in social psych demonstrated grades did help intrinsic motivation. It was just blind reward that did not. For example, giving everyone a medal for playing a game makes them stop playing the.game. grading them does not because it reward their hard work. It teaches them that the.process is important. It's just a point. I can try to find the studies at one point.