What if deadlines, imposed goals, surveillance and evaluations were found to all undermine intrinsic motivation?
What if grades, gold stars, and other rewards for performance sabotage a student's desire to engage in learning for its own sake?
Are you prepared to engage with these questions or are they too threatening?
If you are willing to see cognitive dissonance as an opportunity to play with, rather than a crisis to be avoided, I suggest you try playing the game You say you want this, so then why are you doing that? by taking a look at these three books:
Why We Do What We Do by Edward Deci
Punished by Rewards by Alfie Kohn
Drive by Dan Pink