I just read a blog post by the National Council of Teachers of Mathematics President, J. Michael Shaughness, about the Common Core State Standards for Mathematics. In his post, CCSSM and Curriculum and Assessment: NOT Business as Usual, Shaughness shares his thoughts about how the common core movement affords our nation an opportunity to make significant changes in mathematics instruction. He includes links to assessment sites and his thoughts on curriculum and instruction. Shaughness encourages schools to begin examining current curriculum to see how it aligns to the common core but warns against states or districts writing their own curriculum. With the majority of the states adopting the common core standards, this is our first opportunity to have a nationwide collaborative community working to improve mathematics curriculum, and instructional and assessment practices.