Common Core is a set of standards (http://www.corestandards.org/Math/ http://www.corestandards.org/Math/). I don't think there is one official way of teaching

Common Core is a set of standards (http://www.corestandards.org/Math/ http://www.corestandards.org/Math/). I don't think there is one official way of teaching that is "Common Core." The texts currently labeled Common Core are mostly copy-and-paste remixes of existing material. The exams labeled "Common Core" are unfortunately similar. They don't test the standards as written. For math, a discussion at http://www.washingtonpost.com/blogs/answer-sheet/wp/2014/11/30/a-dissection-of-common-core-math-test-questions-leaves-educator-appalled/ http://www.washingtonpost.com/blogs/answer-sheet/wp/2014/11/... . Unfortunately, a theme seems to emerge of Pearson tests written to test Pearson materials, some of which have a "Common Core" label.