„On average across OECD countries in 2018, 52 % of students attended schools that offer after-school lessons for both remedial and enrichment purposes; 31 % attended schools that offer these lessons for remedial purposes only; 12 % were in schools that offer these lessons integrating remedial and enrichment purposes; and only 5 % of students attended schools that offer these lessons for enrichment purposes only.“
OECD (Hrsg.), PISA 2018 Results. Effective Policies, Successful Schools (2020), S. 140.
In Österreich waren es 23 %, 67 %, 9 % bzw. nur 0,6 %. (Quelle: ibidem, Table V.B1.6.18.)