Labor (1) Minors (1) Origin (1) Constructivism (Education) (1) Women teachers (1) Trials (1) Teaching (1) Signs and symbols (1) School children (1) Responsibility (1) Reality (1) Progress (1) Population (1) Play (1) Paper (1) Occupations (1) Motion (1) Mediation (1) Letters (1) Interviews (1) Girls (1) Education, Preschool (1) Education (1) Content analysis (Communication) (1) Children (1) Child development (1) Niños--Desarrollo (1) Origen (1) Profesoras (1) Mediación (1)