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2 Sigma Problem

Experiments using three types of learning methods

  1. conventional classroom learning;
  2. mastery learning; Apparently 1st defined by Bloom. Class sizes of 20 to 30 students, which as a group must get at least 90% on a knowledge test before the class moved on. Formative tests are given to inform corrective procedures and others to test understanding
  3. 1-to-1 tutoring; Individual teaching using formative tests and feedback similar to the mastery learning tests.

Results

Questions

  1. How do the “smart” or the less motivated students deal with mastery learning’s requirement to keep going over a topic until all achieve 90%?
  2. How would a teacher handle this in a traditional setting?

Methods

Bloom’s (1984) suggestions

Implementation requirements

Problems with 2-sigma

Sources

Bloom, B. S. (1984). Sigma of Problem : The Methods Instruction One-to-One Tutoring. Educational Researcher, 13(6), 4–16.

VanLehn, K. (2011). The relative effectiveness of human tutoring, intelligent tutoring systems, and other tutoring systems. Educational Psychologist, 46(4), 197–221.