Jeff Jarvis (Public Parts, p. 54)
In our schools, we teach students there is one and only one right answer to every question. Then we add the questions together in tests and teach to those tests, expecting students to spit back what we feed them. We call that achievement. We should instead be encouraging experimentation, rewarding challenges to our accepted wisdom, and designing schools around learning through failure.
I couldn't agree more. If I can find a way to truly implement this idea in my teaching, I will.