Study and teaching -- English language -- 8 Audio-visual aids 6 Self-instruction -- 5 Sound recordings 5 Foreign speakers 2 Chinese language -- 1 more ... Computer network resources 1 Computer-assisted instruction 1 Conversation and phrase books 1 Grammar 1 Pronunciation -- 1 Pronunciation by foreign speakers 1 Self-instruction 1 Study and teaching 1 Study and teaching for foreign speakers 1 Textbooks for foreign speakers 1 Vocabulary 1 tTechnological innovations 1 less ...