The history of opposition to the Common Core is pretty absurd.
It began as a common sense bipartisan effort spearheaded by the state governor’s association. Every state has standards of some kind. Some of them are really good, and some of them are a little weak. So right now, it’s very hard to share resources (lesson plans, text books, best practices) across states, leading to a lot of duplication of effort. An amazing second grade teacher in Maryland may come up with some great materials, but they won’t be any good for teachers in DC or Virginia who are required to teach to slightly different standards. There are all kinds of great online lesson banks and the like, but it’s hard to make them really work with 50 different standards.
Another issue is that it’s hard to compare education across states, making it difficult to learn much about what works and what doesn’t. Every state can be compared against it’s own standards, but you can’t easily compare performance of education systems across states. It’s hard to get a national picture of which states are working and which ones aren’t.
So the basic idea was that states wanted to collaborate to create a set of shared standards, based on best practices from states with well-crafted standards. It’s worth remember that standards are about what a student should be able to do at a certain point, but are not about what to teach or how to teach it. So, the standards may say that a seventh grader should be able to write a basic essay, but it’s up to the school/district/state exactly how to go about teaching that and what types of assignments to give. At the moment, the only “Common Core” standards are English Language Arts and mathematics, although various organizations are trying to build support for other standards. There are two competing assessment consortia developing assessments for them (which are voluntary for states.
Anyway, all was buzzing along, and then two things happened.
One is that low-achieving southern states started to get cold feet about being compared to other states. The assessments are not absurdly difficult, but in some cases they are a lot more rigorous than what people are used to. They definitely won’t let high schoolers who can’t read and the like slip by.
But more importantly, a pretty small group of bloggers and local politicians decided to try to make this a thing. They started posting pretty absurd things- stuff like claiming PETA manuals were now mandated instructional material. Since few people knew much about the Common Core at that time, these urban legends started spreading pretty well. Eventually, more mainstream politicians took note at the “grassroots” opposition and decided it would be a good wedge issue, tied it to Obama/federal overreach, and the rest is history.