Reading and math in the common core era (Brookings)

Common Core State Standards (CCSS) have been adopted as the reading and math standards of more than 40 states. All but a few states scheduled full implementation of the standards, including assessments, by the end of the 2014-15 school year. Three states (Indiana, Oklahoma, and South Carolina) have rescinded previous adoptions of the Common Core, and others have made minor revisions. This section of the Brown Center Report (BCR) will exploit the variation in state implementation of CCSS to look at the association of the standards with reading and mathematics performance in grades four and eight, the two grades tested by the National Assessment of Educational Progress (NAEP).

http://www.brookings.edu/research/reports2/2016/03/24-brown-center-report-common-core-loveless