„Students who were enrolled in schools that offer more creative extracurricular activities (including music and art activities) performed better in reading, on average across OECD countries (by 4 score points) and in 32 countries and economies, after accounting for students’ and schools’ socio-economic profile. […] Countries and economies whose schools offer more creative extracurricular activities tended to show greater equity in student performance.“
OECD (Hrsg.), PISA 2018 Results. Effective Policies, Successful Schools (2020), S. 134.