Research into vocabulary knowledge often differentiates between breadth (how many words a person knows) and depth (how well the words are known). Both theoretical categories are essential for understanding language learners' lexical development, but how the different aspects of vocabulary knowledge interconnect has not received the same attention…

In this study, researchers evaluated the effects of peer-assisted multimedia vocabulary instruction, which was designed to address the goal of building knowledge of discipline-specific definitions of language arts terminology for six ninth-grade English Language Learners (ELLs) with or at-risk for learning disabilities. To evaluate the effects of…