This book is a guide to teaching English vocabulary to second-language learners. The book is divided into 30 chapters that teach 240 critical words. This vocabulary includes what English-as-a-Second-Language (ESL), adult literacy, and pre-general equivalency diploma students need to get ahead in today's competitive world. The guide's distinctive features include these: (1) an intensive words-in-context approach; (2) abundant and varied practice; (3) a focus on essential words; (4) sensitivity to students' needs, appealing content; (5) a clear format; and (6) helpful supplements. The guide is one in a series that includes "Building Vocabulary Skills,""Improving Vocabulary Skills,""Advancing Vocabulary Skills," and "Instructors Manual." (JL)