Frank Boers is Professor of Applied Linguistics and TESOL at the Faculty of Education of Western University, Canada. His early publications were in the areas of lexicology, metaphor studies, and comparative linguistics, but since the 2000s he has published mostly on matters of second language education, often with a focus on instructional approaches to vocabulary, including multiword expressions such as idioms. His principal mission is to develop and evaluate evidence-based strategies for enhancing language learning efficacy. He maintains an active graduate supervision record and has previously served as the editor for the international journal Language Teaching Research.