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Direct linkLeung, Cynthia B.; Silverman, Rebecca; Nandakumar, Ratna; Qian, Xiaoyu; Hines, Sara – American Educational Research Journal, 2011
The present study investigated preschoolers' knowledge of vocabulary that appears in first grade basal readers by applying Rasch modeling to data from a researcher-developed receptive picture vocabulary assessment administered to 238 children. Levels of word difficulty for dual language learners (DLLs) and monolingual English learners (MELs) were…
Descriptors: Basal Reading, Monolingualism, Glossaries, Vocabulary Development
Download full textMoorthy, Savitha; Sanchez, Raquel; Tseng, Fannie – Society for Research on Educational Effectiveness, 2010
The objective of this paper is to provide some practical insight into the process of implementing large-scale randomized controlled trials (RCT) in educational settings and to provide general recommendations for researchers conducting education-based RCTs in the future. The authors draw their recommendations from their recent experiences…
Descriptors: Research Methodology, Science Experiments, Research Design, Educational Research
