In addition, while regulators care about average effect sizes, practitioners want to know whether a given intervention will work in their own classrooms. (educationnext.org)
They didn't all have to do with instruction, but of the instructional strategies I believe feedback had the highest average effect size. (iobservation.com)
For each policy, the literature was reviewed from January 2000 through July 2012 to find evidence of effectiveness and to create average effect sizes. (sciencedaily.com)