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What Works Clearinghouse, 2017
The What Works Clearinghouse (WWC) evaluates research studies that look at the effectiveness of education programs, products, practices, and policies, which the WWC calls "interventions." Many studies of education interventions make claims about impacts on students' outcomes. Some studies have designs that enable readers to make causal…
Descriptors: Program Design, Program Development, Program Effectiveness, Program Evaluation
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Gersten, Russell; Baker, Scott K.; Shanahan, Timothy; Linan-Thompson, Sylvia; Collins, Penny; Scarcella, Robin – What Works Clearinghouse, 2007
This Practice Guide is the first in a series of the Institute of Education Sciences (IES) guides in education that are developed by a panel of experts. The guides are intended to bring the best available evidence and expertise to bear on the types of systemic challenges that cannot currently be addressed by single intervention or programs. This…
Descriptors: Second Language Learning, English Instruction, Vocabulary Development, Literacy