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Pupils aged 15 in Denmark are exposed to 4 hours of instruction per week ...

„Pupils aged 15 in Denmark are exposed to 4 hours of instruction per week in math and 4.7 in language, while pupils of the same age in Austria have only 2.7 hours of weekly classroom lessons in math and 2.4 in language.“

Univ.-Prof. Dr. Victor Lavy, „Do Differences in School's Instruction Time Explain International Achievement Gaps in Maths, Science and Language?“ (2010), S. 1