From the Huffington Post article by John Merrow: Blame the Teacher!
"I conclude that we need higher standards and a more challenging environment. Not a more 'rigorous' one, but a more challenging and interesting one. Unfortunately, and for reasons I don't understand, many powerful people are defining public education's problem as 'bad teachers.' That's simplistic and dangerous."
A number of people have been writing in the last couple of days about the need to reduce the amount of teacher bashing and most teacher bashing imply that teachers aren't providing rigorous environments. I like the idea of challenging environments. The subtle difference between challenging and rigorous is small, but important.
This is a pretty good article that goes into some of the ways to actually fix education instead of blaming the teachers.