Every time there is a new school "reform," there turns out to be a lot of unexpected collateral damage. For example, a new required course to graduate from high school will be added, but some sizable fraction of the students won't get the class added to their schedules. The bureaucracy drops the ball, the kids drop the ball, and their parents drop the ball. So, marginal students don't graduate from high school. Military strategists have a concept called "friction" or random negative events that prevent the plan from being carried out as written. Something like that happens with school reforms, too. So, these fads like No Child Left Behind wind up having large human costs that nobody anticipates.