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Mahoney, Kate; Lillie, Karen E.; Rolstad, Kellie; MacSwan, Jeff; DuBois, Natalie; Haladyna, Tom – International Journal of Bilingual Education and Bilingualism, 2022
The authors evaluate the success of Arizona's program for English Learners (ELs) twelve years after the implementation of Proposition 203 to determine whether it meets the "third prong" test of CastaƱeda v. Pickard (1981), which requires a demonstration of the effectiveness of a program after its implementation. This study is a follow-up…
Descriptors: State Legislation, English Language Learners, Court Litigation, Program Effectiveness
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Hedges, Larry V.; Hedberg, E. C. – Evaluation Review, 2013
Background: Cluster-randomized experiments that assign intact groups such as schools or school districts to treatment conditions are increasingly common in educational research. Such experiments are inherently multilevel designs whose sensitivity (statistical power and precision of estimates) depends on the variance decomposition across levels.…
Descriptors: Correlation, Multivariate Analysis, Educational Experiments, Statistical Analysis
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Lazarev, Valeriy; Newman, Denis; Sharp, Alyssa – Regional Educational Laboratory West, 2014
This study explored the relationships among the components of the Arizona Department of Education's new teacher evaluation model, with a particular focus on the extent to which ratings from the state model's teacher observation instrument differentiated higher and lower performance. The study used teacher-level evaluation data collected by the…
Descriptors: Teacher Evaluation, Observation, State Departments of Education, Correlation