jeunesse (1) établissement scolaire (1) papier (1) évaluation (1) éducation (1) coût (1) âge (1) Education (1) Children (1) Case (1) Net present value (1) Youth (1) Wages (1) Population (1) Paper (1) Overhead costs (1) Grammar, Comparative and general--Case (1) Evaluation (1) Education (1) Cost (1) Children (1) Child development (1) Case (1) Age (1) Academic achievement (1) Youth (1) Age (1) Population (1) Evaluation (1)