This innovative workbook and DVD pack provides a hands-on introduction to the study of language used by learners of English as a Second Language (ESL). The DVD features six adult ESL learners and two native speakers of English doing individual and pairwork language tasks. Linked exercises in the book guide the reader through an analysis of the language used by the ESL learners, with full transcripts and an answer discussion section for reference. Through doing learner language analysis at the descriptive case-study level, language teachers can develop skills for exploratory practice that will help them to address their queries about learner language in their own