The Council of the Great City Schools supports member districts in raising the mathematics achievement levels of all students.  The Council has long advocated for rigorous expectations for all students in kindergarten through grade twelve. For mathematics, we are developing effective tools, resources, and providing professional development to support school districts in elevating the level of student performance.  We collaborate with other professional organizations and school district leaders to support implementation of college-and career-readiness standards, build a shared understanding of the instructional shifts and their implications for curriculum, assessment, instructional resources, and professional development. This collaboration supports teaching and learning in the largest urban districts across the nation so that our children are college and career ready when they graduate from high school.