This workbook is a revised edition of the volume published in 1984 by Larry Selinker and Susan Gass entitled Workbook in Second Language Acquisition. Like the first edition, this edition provides a research-centered view of second language acquisition (SLA) that seeks to build an awareness of the issues, types of data, and methods of analysis through a series of practical problems of data analysis and related questions. The data and problems, which all focus on English as the target language, are drawn from articles published between 1968 and 1993, the majority of them “SLA classics” published in the 1980s. The book includes a short glossary and has accompanying tape-recorded material not provided to the reviewer.