effet (7) éducation (7) Education (7) Finance (7) Education (7) Finance (7) recherche (5) politique (5) santé (5) Students (5) Schools (5) Research (5) Health (5) Research (5) Health (5) Students (5) Children (4) Children (4) papier (3) expérience scientifique (3) Agreement (3) School children (3) Paper (3) Gifts (3) Average (3) Ability (3) Opportunity (3) Size (3) élite (3) état (2)