Full implementation of the Common Core State Standards for mathematics is still a few years away for many states. But district and school leaders are faced with many decisions now--from curriculum adoption to teacher professional development--that will influence the long-term effectiveness of this bold initiative. School leaders have a significant…

About three-fourths of the states have already adopted the Common Core State Standards, which were designed to provide more clarity about and consistency in what is expected of student learning across the country. However, given the brief time since the standards' final release in June, questions persist among educators, who will have the…