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The average 15-year-old student in an OECD country ...

„Based on students’ self-reports in PISA 2012, the average 15-year-old student in an OECD country spends 3 hours and 38 minutes per week in mathematics lessons. […] Across OECD countries, students in 2012 spent an average of 13 minutes per week more in mathematics classes than they did in 2003.“

OECD (Hrsg.), „PISA in Focus“, Nr. 54, August 2015, S. 1f

In Österreich sind es hingegen nur 2 Stunden 36 Minuten; um 10 Minuten weniger als im Jahr 2003. (Quelle: ebendort)