Faculty and administrators often believe that abbreviated courses are less effective than the same courses taught during a full semester. This study examined student academic performance and course evaluations for identical courses taught during abbreviated summer sessions or during regular semester sessions. Contrary to popular convention,…

Widespread agreement exists that U.S. teachers need improved mathematics knowledge for teaching. Over the past decade, policymakers have funded a range of professional development efforts designed to address this need. However, there has been little success in determining whether and when teachers develop mathematical knowledge from professional…