There's not much to add to this post by Neal McCluskey. Go and read.
I have a small disagreement with many NCLB critics: one could make a decent argument for local determination of curriculum and performance measures, and still support NCLB. The choice of metric or English Standard measurement will not change my height or weight. The numbers will depend on the standard, but the rank (measure) will not change. If I outweigh my neighbor, by metric measure, I will outweigh my neighbor by English Standard measure.