Teaching (6) Enseñanza (6) English language (5) Education (5) Lengua inglesa (5) Educación (5) Labor (4) Trabajo (4) éducation (4) Tongue (3) Physicians (3) Lengua (3) Médicos (3) Evolution (Biology) (2) Thought and thinking (2) Students (2) Reality (2) Paper (2) Medicine (2) Medical personnel (2) Materials (2) History (2) Communication (2) Personal sanitario (2) Expresión (2) Segunda lengua (2) Pensamiento (2) Realidad (2) Estudiantes (2) Papel (2)