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Reezigt, Gerry J.; Weide, Marga G. – 1990
As part of an educational reform in the Netherlands, teachers were required to implement models of adaptive instruction, including group-based mastery learning. It was expected that mastery learning would raise achievement and reduce differences in achievement among children of different social classes and between girls and boys. In 1987, students…
Descriptors: Academic Achievement, Achievement Gains, Dutch, Elementary School Students
