The 2010 introduction of Common Core, a set of requirements for what elementary and secondary school children should know in math and English language arts, has turned schools in one state after another into battlefields as its complexity and other factors led to protests against it. Even so, by mid-2014, a NBC/Wall Street Journal poll found that very nearly half of those asked about it hadn’t even heard of it. A number of states, such as Missouri, Indiana, Oklahoma, and South Carolina have withdrawn from it.
