The 2 Sigma Problem: The Search for Methods of Group Instruction as Effective as One-to-One Tutoring

T w o University of Chicago doctoral students in education, Anania (1982, 1983) and Burke (1984), completed dissertations in which they compared student learning under the following three conditions of instruction: 1. Conventional. Students learn the subject matter in a class with about 30 students

Source: doi.org/10.3102/0013189x013006004

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