This paper introduces a variation on the post-test only cohort control design and addresses questions concerning both the methodological credibility and the practical utility of employing this design variation in evaluations of large-scale complex professional development programmes in mathematics education. The original design and design…

Background: To attain accurate information about student performance, teachers must apply sound classroom assessment practices. First, teachers need to be able to understand and identify the purpose of their assessments. Teachers also need to provide their students with clear learning targets, in language that students can easily understand, so…