There is little doubt that computers and other media have changed the face of learning in general, and language learning in particular. Idioms, as one of the most challenging areas of language, are no exception. This book is an empirical study investigating the feasability as well as the effectiveness of computer-based distance learning procedures applied to L2 idioms learning. It offers a relatively rich literature review and an empirical analysis of the effect of electronic glossing and hyperlinking on Iranian EFL learners' comprehension and production of English Idioms. It could be interesting for EFL learners, teachers, and materials developers.