Objective: In the past decade, several authors have advocated that formative assessment programmes have an impact on teachers' knowledge. Consequently, various requirements have been proposed in the literature for the design of these programmes. Only few studies, however, have focused on a direct comparison between programmes with respect to…

This research report builds on the results of the CATCH project (Webb and Dekker, 2002). The CATCH project is an effort to apply and scale up previous results and design a professional development program to bring about fundamental changes in teachers' instruction to support change in teachers' formative assessment practices. In this report we…