Phelps, Richard P - In: Nonpartisan Education Review 8 (2012) 4, pp. 1-34
This presentation summarizes research on the effect of testing on student achievement as found in English-language sources, comprising several hundred studies conducted between 1910 and 2010. Among quantitative studies, mean effect sizes range from a moderate d ˜ 0.55 to a fairly large d ˜...