New York is ahead of most states in its work to design detailed curricula and professional development for the common core and to build brand-new tests to reflect them. What's unfolding in the Empire State as a result of that work illustrates the way the common standards can pressure changes in the education landscape, and torque the tensions…

Even though 34 states and the District of Columbia have No Child Left Behind Act waivers in hand, many of them are still negotiating with the U.S. Department of Education over their teacher evaluation systems--a crucial component if they want to keep their newfound flexibility. More than six months after waiver recipients turned in their…