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Direct linkHedges, Larry V.; Hedberg, E. C. – Educational Evaluation and Policy Analysis, 2007
Experiments that assign intact groups to treatment conditions are increasingly common in social research. In educational research, the groups assigned are often schools. The design of group-randomized experiments requires knowledge of the intraclass correlation structure to compute statistical power and sample sizes required to achieve adequate…
Descriptors: Educational Research, Academic Achievement, Correlation, Experiments
Garelick, Barry – Education Next, 2006
In December of 2004, media outlets across the country were abuzz with news of the just-released results of the latest Trends in International Mathematics and Science Study (TIMSS) tests. Once again despite highly publicized efforts to reform American math education over the past two decades, the United States did little better than average. Taken…
Descriptors: Foreign Countries, Grade 8, School Restructuring, Pilot Projects
PDF pending restorationWashington Office of the State Superintendent of Public Instruction, Olympia. – 1998
This report provides a summary for the years 1993 through 1997 of district and school-level results in Washington on the Comprehensive Tests of Basic Skills, fourth edition (CTBS/4) for grades 4 and 8 and the Curriculum Frameworks Assessment System (CFAS) for grade 11. For grades 4 and 8, the average national percentile scores in reading,…
Descriptors: Academic Achievement, Academic Standards, Achievement Tests, Educational Trends
