"Who's Minding the Schools?" by Andrew Hacker and Claudia Dreifus. I think you'll find these two quotes interesting:
"By the 2014-15 academic year, public schools in 45 states and the District of Columbia will administer Common Core tests to students of all ages."
". . . most private, non-religious schools have concluded that the program isn't for them."
In any case, do read the article.