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A Review of Research on Project STAR and Path Ahead
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Sohn, Kitae – School Effectiveness and School Improvement, 2016
Understanding the effects of class size reduction (CSR) has been an enduring issue in education. For the past 3 decades, Project STAR has stimulated research and policy discussions regarding the effects of CSR on a variety of outcomes. Schanzenbach (2007) reviewed STAR studies and concluded that small classes improved student academic outcomes.…
Descriptors: Class Size, Small Classes, Educational Policy, Outcomes of Education
Three Conditions under Which Experiments and Observational Studies Produce Comparable Causal Estimates: New Findings from within-Study Comparisons
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Cook, Thomas D.; Shadish, William R.; Wong, Vivian C. – Journal of Policy Analysis and Management, 2008
This paper analyzes 12 recent within-study comparisons contrasting causal estimates from a randomized experiment with those from an observational study sharing the same treatment group. The aim is to test whether different causal estimates result when a counterfactual group is formed, either with or without random assignment, and when statistical…
Descriptors: Causal Models, Experiments, Pretests Posttests, Job Training
Class Size Effects: Assessing the Evidence, Its Policy Implications, and Future Research Agenda. Conclusion.
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Grissmer, David – Educational Evaluation and Policy Analysis, 1999
Summarizes evidence for the effects of class-size reduction from experimental and nonexperimental measurements, addresses questions about the robustness of each type of estimate, and suggests hypotheses that could reconcile differences resulting from conflicting evidence. Discusses potential costs and the implications for future research into the…
Descriptors: Academic Achievement, Class Size, Costs, Experiments