The recent development and release of K-12 mathematics curriculum standards by influential national groups (Achieve, the American Statistical Association, the College Board, and the National Council of Teachers of Mathematics) represents a unique and important window of opportunity to promote and stimulate collaboration among users of standards. Thus, the Center for the Study of Mathematics Curriculum (CSMC) organized a national conference focusing on K-12 mathematics curriculum standards. The conference featured presentations on the most recent mathematics curriculum recommendations and engaged "users" of standards (state and district curriculum specialists, textbook and assessment publishers, K-12 district and teacher leaders, and representatives from higher education and business) in discussions about implications for their work.