Development (2) Students (2) Compétence (2) Développement (2) Élèves (2) nombre (2) Children (1) Boundaries (1) Diseases (1) Adaptation (1) Surveys (1) Self-efficacy (1) Teenagers (1) Wealth (1) Voice (1) Time (1) Success (1) Solitude (1) Social control (1) Self-perception (1) Schools (1) School year (1) Proportion (1) Profit (1) Production (Economic theory) (1) Possibility (1) Percentage (1) New and old (1) Mechanical movements (1) Longitudinal method (1)