Public speaking 62 Study and teaching 48 Self-presentation 47 Interpersonal communication 43 English language -- 40 Politics and government 33 Speeches, addresses, etc 31 more ... History 30 Management 30 Foreign relations -- 26 Economic conditions 21 Courses -- 20 Communication 18 Foreign relations 18 Management -- 17 Description and travel 16 Leadership 16 Spanish language -- 16 Closing ceremony 15 Global economy 14 History -- 13 Politics and government -- 13 Negotiation 12 Television broadcasting of news -- 12 Budget -- 11 Farewells 11 Business communication 10 German language -- 10 Literature 10 Oral communication 10 less ...