Previous research has shown that the knowledge structure (KS) complexity of a first language (L1) under certain conditions can strongly influence the KS complexity established in a second language (L2), and then this more complex L2 KS reciprocally influences L2 text comprehension. This present experimental investigation seeks to identify the…

Academic language is critical for English learners (ELs) to succeed in the science classroom. This study analyzed the instructional practices centered around academic language taking place in eight, fifth-grade classrooms during a grant-funded project. Observational data collected through a classroom observation instrument were analyzed to…

The purpose of this study was to compare and describe 8 fifth-grade classrooms by their teachers pedagogy during a quasiexperimental, longitudinal, and field-based project focused on increasing English language learners' (ELLs') achievement in science and language. The larger study found statistically significant and positive intervention effects…

The present study investigated the effectiveness of the Glogster and cooperative learning as differentiation models of English as a second/foreign language (ESL/EFL) and Science projects. The study employed a mixed method study design whereby questionnaire and openended interview were incorporated to elicit the required data. Eighteen teachers…

This meta-analysis synthesizes the last two decades of experimental and quasi-experimental research on reading instruction across academic contexts (e.g., social studies, science, mathematics, English language arts) for English learners (ELs) in grades 4 through 8, to determine (a) the overall effectiveness of reading instruction for upper…

This paper examines whether students involved in CLIL are able to learn content through the medium of L2 and simultaneously exhibit significant gains in L2 vocabulary knowledge. Two experiments were set up in two public primary schools. Two groups of 6th grade students participated in each experiment. The first group was taught three 80-minute…