Education (4) Educación (4) éducation (4) Research (3) Investigación (3) Teachers (2) Students (2) Physical education and training (2) Estudiantes (2) Profesores (2) Educación física (2) Conocimiento (2) sport (2) Madrid (1) Labor (1) Evolution (Biology) (1) Teenagers (1) School enrollment (1) Vision (1) Teaching (1) Sports (1) Spaniards (1) Social values (1) Population (1) Play (1) Physics (1) Perception (1) Paper (1) Learning, Psychology of (1) Ideology (1)