In this report, SREB’s Benchmarking State Implementation of College- and Career-Readiness Standards project studied state efforts in 2014-15 and 2015-16 to foster effective professional learning for educators on state college- and career-readiness standards in English language arts and math, K-12. SREB uses the findings of this study to provide state leaders with actionable feedback on and support for their work, to inform the continuous improvement of state education policies and practice.