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Direct linkSlavin, Robert E.; Lake, Cynthia; Groff, Cynthia – Review of Educational Research, 2009
This article reviews research on the achievement outcomes of mathematics programs for middle and high schools. Study inclusion requirements include use of a randomized or matched control group, a study duration of at least 12 weeks, and equality at pretest. There were 100 qualifying studies, 26 of which used random assignment to treatments. Effect…
Descriptors: Cooperative Learning, Effect Size, Teaching Methods, Middle Schools
