In outstanding classrooms, teachers do more listening than talking, and students do more talking than listening. Terrific teachers often have teeth marks on their tongues.
Trying to be number one and trying to do a task well are two different things.
Maximum difficulty isn't the same as optimal difficulty.
The race to win turns us all into losers.
Punishments and rewards are two sides of the same coin and that coin doesn't buy you much.
Punishment and reward proceed from basically the same psychological model, one that conceives of motivation as nothing more than the manipulation of behavior.