Teachers (2) Research (2) Physical education and training (2) Education (2) Educación (2) Profesores (2) Investigación (2) Educación física (2) éducation (2) Teenagers (1) School enrollment (1) Students (1) Spaniards (1) Population (1) Physics (1) Perception (1) Learning, Psychology of (1) Health (1) Concepts (1) Character (1) Estudiantes matriculados (1) Brasileños (1) Salud (1) Españolas (1) Educación Primaria (1) Estudiantes (1) Conceptos (1) Percepción (1) Población (1) Carácter (1)