A manual for teaching vocabulary to students of English as a second language is introduced by a discussion of the reasons for neglecting vocabulary development in the past and the reasons for the present emphasis on it. The chapters that follow develop practical instructional methods for each language learning level. The topics include: (1) vocabulary lessons for the first stage of classroom language exposure; (2) more techniques for beginners' classes; (3) special uses of visual aids; (4) teaching vocabulary in intermediate classes; (5) accommodating differences among intermediate students; (6) new and more specialized kinds of meanings for intermediate classes; (7) basic techniques for advanced classes; (8) comprehension and production in advanced classes; and (9) choosing vocabulary words and evaluating their mastery. Appendixes include: an illustration of "picturable actions," 300 useful adjectives, 1200 useful nouns and verbs, suggested questions for conversations and correspondence with native speakers, an introductory crossword puzzle, and sample questions from the Test of English as a Foreign Language. (MSE)