Common Core has nothing to do with the federal government, it was developed by the NGA.
Coordinated by NGA isn't the same as developed by the NGA.
Common Core State Standards
Could the CORE be problematic?
Common Core State Standards Initiative | Frequently Asked Questions
Read the FAQ's and consider for yourself. This one jumped out to me. Guidance? Nope, requirements. Expectation of all being 'college ready.' Worse than NCLB, again with 'all.' It's not a case of 'unintended consequences' it's a case of crazy talk, the US requires compulsory education through at least 16 years of age. Some of those students come from backgrounds that make the word 'neglect' impossible to define. Some are too sick to be in school, yet the schools are required to have them 6 hours per day, unless they're in a hospital or their parents just can't get them on the bus. Notice, so far haven't even addressed kids that are healthy and have reasonable nurturing, but really don't have the aptitude or perhaps interests in things academic:
What guidance do the Common Core State Standards provide to teachers?
The Common Core State Standards are a clear set of shared goals and expectations for the knowledge and skills students need in English language arts and mathematics at each grade level to ultimately be prepared to graduate college and career ready. The standards establish what students need to learn, but they do not dictate how teachers should teach. Teachers will continue to devise lesson plans and tailor instruction to the individual needs of the students in their classrooms.