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Grouping students by ability may allow teachers to more effectively target teaching to the levels of students in their classes ...

„Grouping students by ability may allow teachers to more effectively target teaching to the levels of students in their classes. […] In India, schools reorganized classes by group for just an hour a day and observed major gains in learning.“

The World Bank (Hrsg.), „Learning to Realize Education's Promise“ (2018), S. 134