„Participation in ECEC is beneficial for children who speak a different language at home than the one spoken in school. PISA 2015 shows that immigrant students who attended ECEC for at least one year scored 36 points higher in the science assessment domain. After accounting for student economic status, this gap remained significant at 25 score-points (i.e. ten months of formal schooling).“
OECD (Hrsg.), Changing the Odds for Vulnerable Children (2019), S. 20.