This research deals with teaching techniques of the English vocabulary. The study reviews the characteristics of the vocabulary; what types of the vocabulary there are, what it means when we know a word and what aspect of words we teach. After discussing the theory of the vocabulary teaching, the study introduces sample vocabulary exercises developed by others and the author, and the results of English classes which was experimented on with emphasis on the vocabulary teaching. The study concludes that teaching English with emphasis on the vocabulary improves English proficiency and communicative competence as well. The study suggests that it be very helpful to have students understand the importance of vocabulary and learn vocabulary effectively and systematically to improve their English proficiency.