Study and teaching Spanish language 36 History 35 Education 28 Art 20 Foreign speakers 19 Mathematics 18 más ... Social aspects 17 Training of 16 Language and languages 15 Philosophy 15 Architecture 11 English language 11 Peace 11 Citizenship 10 Human rights 10 Teaching 10 Law 9 Literature 9 Methodology 9 Research 9 Science 9 Technological innovations 9 Second language acquisition 8 Social sciences 8 Geography 7 Peace-building 7 Curricula 6 Grammar 6 Multicultural education 6 menos ...