Language learners are underserved if there are unlearned meanings of a word that they think they have already learned. For example, "circle" as a noun is well known, whereas its use as a verb is not. For artificial-intelligence-based support systems for learning vocabulary, assessing each learner's knowledge of such atypical but common…

As a teacher of an intensive class for college-level students that focuses on learning the Test of English for International Communication (TOEIC) vocabulary, Kelly Keegan wanted to create and play vocabulary-review games that encourage flexibility and spontaneity in authentic contexts. This article describes how she created games that give…