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Download full textUnlu, Fatih; Layzer, Carolyn; Clements, Douglas; Sarama, Julie; Cook, David – Society for Research on Educational Effectiveness, 2013
Many educational Randomized Controlled Trials (RCTs) collect baseline versions of outcome measures (pretests) to be used in the estimation of impacts at posttest. Although pretest measures are not necessary for unbiased impact estimates in well executed experimental studies, using them increases the precision of impact estimates and reduces sample…
Descriptors: Mathematics Instruction, Intervention, Pretests Posttests, Curriculum Design
