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Overall, total weekly hours of instruction in math, language and science ...

„Overall, total weekly hours of instruction in math, language and science is 55 percent higher in Denmark (11.5 hours) than in Austria (7.4 hours).“

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