School failure (2) Labor (2) School children (2) Education--History (2) Education (2) Educación--Historia (2) Fracaso escolar (2) Escolares (2) Educación (2) Trabajo (2) éducation (2) School enrollment (1) Water (1) Trials (1) Towers (1) Thought and thinking (1) Teaching (1) Social classes (1) Semantics (1) Science (1) Schools (1) Reason (1) Production (Economic theory) (1) Population (1) Politicians (1) Perspective (1) Nursery schools (1) Nation-state (1) Mechanical movements (1) Language and languages (1)