... Vocational College c determining the effectiveness of using pictures in teaching vocabulary of English to the second year students of Mechanical Department at Haiphong Industrial Vocational college ... aspect of language theory and practice in this study Therefore, the study focuses on using pictures in teaching vocabulary to the second year students of Mechanical Department at Haiphong Industrial ... definitions of vocabulary, the classification of vocabulary, the roles of vocabulary, the stages in teaching vocabulary and picture theory includes concept of pictures, the principles of selecting a pictures, ...