„Analysis of data from OECD’s 2015 Programme for International Student Assessment (PISA), which measures 15-year-olds’ ability to use their reading, mathematics and science knowledge and skills to meet real-life challenges, shows that ECEC duration is the strongest predictor of good performance at age 15.“
EU-Kommission (Hrsg.), Building a better understanding of the impact of Early Childhood Education and Care on medium- and long-term educational and labour market outcomes in Europe (2022), S. 7.