Study and teaching -- English language -- 39 Foreign speakers 25 Audio-visual aids 23 Chinese language -- 21 English speakers 19 Study and teaching 19 more ... Self-instruction -- 18 English speakers -- 16 Sound recordings for English speakers 15 English 14 French language -- 13 Self-instruction 13 Interactive multimedia 12 Grammar -- 10 Textbooks for foreign speakers -- 8 Grammar 7 Arabic language -- 6 Chinese Language -- 6 Foreign students 6 Conversation 5 History -- 5 International relations -- 5 Sound recordings 5 Spanish language -- 5 Computer asisted instruction for foreign speakers 4 Conversation and phrase books 4 Conversation and phrase books -- 4 Foreign speakers -- 4 German language -- 4 less ...