English learners (ELs) represent a large and rapidly growing proportion of US public school students. Federal law requires public schools to provide ELs with linguistic supports necessary to equalize their access to instruction with that of native English-speaking students. Most ELs are eventually reclassified and receive instruction within a…

Though it is estimated that about half of the world's population is bilingual, the estimate for the United States is well below 20% (Grosjean, 2010). Amid growing recognition of the need for second language skills to facilitate international commerce and national security and to enhance learning opportunities for non-native speakers of English,…

Confronted with many challenges to improving the quality of U.S. public K-12 education, many policymakers have viewed the study of a second language as a useful but nonessential ingredient of a world-class education system. However, others point out that dual-language education can be a powerful intervention for closing the achievement gap for…

In recent years, governments across the world have increased their investments in early childhood education programs (Britto, Yoshikawa, & Boller, 2011; Engle et al., 2011; Myers, 2006; UNESCO, 2006). This investment in preprimary education reflects the proven value of providing early learning opportunities in promoting later educational…

This study focuses on assessing the contribution of ELL services to Spanish-speaking students' mathematics learning in elementary schools. ELL students tend to have lower average math achievement at school entry and throughout elementary school. The term "ELL services" encompasses English-as-a-second-language (ESL) programs, bilingual…

Based on evidence derived from studies conducted mostly in the United States, many low- and middle-income countries are investing in early childhood education (ECE), with high expectations that it will improve academic outcomes, increase human capital, promote economic growth and reduce economic inequality. In Chile, there has been a great…

This study is part of the core research agenda of the five-year, Goal 3 grant funded by the Institute of Education Sciences, U. S. Department of Education "Improving the Teaching and Learning of English Language Learners: The Instructional Conversation Model." In video review of teaching, bias in evaluation or rating is evident in many…

With the increased population of English learners (ELs), educators need programs that help students access academic content while learning to understand, speak, read, and write English (Tharp, Estrada, Dalteen, & Yamaguchi 2000; Echevarria, Short & Powers, 2006). ELs come into U.S. schools needing to learn the same grade-level content as…

The Multilevel Assessment of Science Standards (MASS) project is creating a new generation of technology-enhanced formative assessments that bring the best formative assessment practices into classrooms to transform what, how, when, and where science learning is assessed. The project is investigating the feasibility, utility, technical quality,…

This study is an evaluation of "Exploring Motion and Forces: Speed, Acceleration, and Friction" ("M&F") developed by ARIES of the Harvard-Smithsonian Center for Astrophysics (2001). Although "M&F" has been used in many schools and field-tested, it has never been evaluated in rigorous experimental or…