One problem with education is that is it 'consensual' For instance, no child left behind set standards, but then left the states to meet those standard. While some good was done with the non-consual bits, i.e. well qualified teachers, hundreds of billions of local tax dollars were wasted paying testing companies and writing curriculum that to some extent were significant duplications of effort.
What needs to be left to local authorities, even down to the teacher, is the choice of how to teach material and a limited buffet of what to teach. What needs to be done on a interstate level is developing the methods of how that learning is going to be assessed. If there was a more consistent, maybe crowdsource, assessment then teachers would probably more understand what they are supposed to teach. Outside of history of the local area, there is little reason to have significant differences in content. What we can have is local differences in content that is emphasized.
The biggest hurdle to this, and the biggest damage the NCLB did, was the need to rank teachers and students. Current testing is not objective based mastery, but rather ranking. This requires an extremely expensive test, with passing levels set arbitratily after the test is given, often to maximize the success of preferred groups of students, rather than based on the objective performance of the student to show mastery of a benchmark number of standards. Therefore instead of measuring that a student has learned the material, and that a teacher has facilitated such learning, we merely have a continuum that is independent of learning, only indicating the ability to fill in bubbles effectively.
This is where the current reforms are still failing. Leaving the punitive ranking system behind and rather focusing on learning. Common Core is a step away from this, which is why no one likes it. Parents like to know their kid is better than others. Administrators like to be able to rank teachers on arbitrary statistically invalid scales.