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Direct linkPane, John F.; Griffin, Beth Ann; McCaffrey, Daniel F.; Karam, Rita – RAND Corporation, 2014
This addendum to previously published results presents alternative analyses of data from large-scale effectiveness studies of Cognitive Tutor Algebra I in middle schools and high schools. These alternative analyses produce results that are substantively the same as previously reported. We find a significant positive effect of 0.21 standard…
Descriptors: Algebra, Statistical Significance, Pretests Posttests, Reader Response
Download full textTaylor, Joseph; Kowalski, Susan; Getty, Stephen; Wilson, Christopher; Carlson, Janet – Society for Research on Educational Effectiveness, 2011
This research is part of a larger, IES-funded study titled: "Measuring the Efficacy and Student Achievement of Research-based Instructional Materials in High School Multidisciplinary Science" (Award # R305K060142). The larger study seeks to use a cluster-randomized trial design, with schools as the unit of assignment, to make causal…
Descriptors: Suburban Schools, Rural Schools, Science Instruction, Science Teachers
