Many children in this study were born into poor families or into working-class families that had cramped homes or other problems, and it's clear now that those disadvantaged children have been more likely to struggle on almost every score.
Muchos niños en este estudio nacieron en familias pobres o en familias de la clase trabajadora con casas estrechas u otros problemas, y está claro ahora que esos niños desfavorecidos han sido más propensos a tener casi siempre problemas con las notas.