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Li, Linlin; Ringstaff, Cathy; Tripathy, Rachel Grimes; Flynn, Kylie; Thomas, Larry – Grantee Submission, 2019
This study evaluated the efficacy of the Word Learning Strategies (WLS) supplementary program to improve elementary students' vocabulary skills and reading comprehension. The study used a multi-site cluster randomized, experimental design, which randomly assigned 92 4th grade classrooms (n=2558 students) from two cohorts to a treatment or control…
Descriptors: Elementary School Students, Vocabulary Development, Learning Strategies, Reading Comprehension
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Heller, Joan I.; Daehler, Kirsten R.; Wong, Nicole; Shinohara, Mayumi; Miratrix, Luke W. – Journal of Research in Science Teaching, 2012
To identify links among professional development, teacher knowledge, practice, and student achievement, researchers have called for study designs that allow causal inferences and that examine relationships among features of interventions and multiple outcomes. In a randomized experiment implemented in six states with over 270 elementary teachers…
Descriptors: Elementary School Science, Faculty Development, Elementary School Teachers, Science Teachers
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Neuman, Susan B.; Cunningham, Linda – American Educational Research Journal, 2009
This study examines the impact of professional development on teacher knowledge and quality early language and literacy practices in center- and home-based care settings. Participants from 291 sites (177 centers; 114 home-based) in four cities were randomly selected to: Group 1, 3-credit course in early language and literacy; Group 2, course plus…
Descriptors: Effect Size, Professional Development, Child Care, Language Acquisition