Study and teaching -- English speakers 15 English language -- 12 Foreign speakers 11 Chinese language -- 10 English 9 Textbooks for foreign speakers -- 8 more ... French language -- 7 Grammar -- 7 Chinese Language -- 6 English speakers -- 5 Grammar 5 Interactive multimedia 5 Study and teaching 5 Arabic language -- 4 Self-instruction 4 Self-instruction -- 3 Sound recordings for English speakers 3 Audio-visual aids 2 Chinese characters 2 Computer asisted instruction for foreign speakers 2 Computer assisted instruction for foreign speakers -- 2 Congresses 2 Conversation 2 Englsih -- 2 International relations -- 2 Problems, exercises, etc 2 Spanish language -- 2 Textbooks for foreign speakers 2 vocabularies 2 less ...