Interviews (2) Education (2) Entrevistas (2) Educación (2) Pérou (1) Bolivie (1) Chili (1) Weights and measures (1) Trials (1) Teachers (1) Students (1) Strategy (1) Schools (1) Quality of products (1) Nursery schools (1) Intention (1) Immigrants (1) Id (Psychology) (1) Happiness (1) Elementary schools (1) Duty (1) Desertion, Military (1) Content analysis (Communication) (1) Chemistry, Analytic--Quantitative (1) Chemistry, Analytic--Qualitative (1) Associations, institutions, etc (1) Intención (1) Deber (1) Gestión (1) Análisis de contenido (1)