No matter how much you measure, use standardized tests, etc, all a program of No Child Left Behind achieves is the Lowest Common Denominator. It needs to be made into 20% SHALL FAIL. Keep increasing the standards, make sure that 20% fail from every grade. This is a competitive country! We need competition in Education. For those that fail, have a support system to focus them toward professions and national needs that don't require college level proficiencies.
Sure it stresses out the kids, it is supposed to. Success is dealing with stress, knowing the pain of failure and the reward of conquering that failure and moving onward. The most successful people in this country are those who failed one less time than they succeeded. There are no successful people who have NEVER failed.