Jay P. Greene's discussion of national education standards in the Wall Street Journal applies to more than just education:
Proposing that all children meet the same standards is essentially proposing a nationalized system of education. Some reformers may argue otherwise, but the truth is that standards drive testing, which in turn drives what material is covered, as well as how and when it is taught.
Such uniformity would only make sense if: 1) there was a single best way for all students to learn; 2) we knew what it was; 3) we could be sure the people running this nationalized education system would adopt that correct approach; and 4) they would remain in charge far into the future. But that isn't how things are.
Those are good cautions to keep in mind when we discuss centralized and mandatory plans for anything, from subsidizing green energy to nation-building in Afghanistan.