Overview
Building on Carroll’s (1963) model of school learning, Bloom (1968) proposed teaching units, formative assessment, correctives or enrichment, and re-testing. His 2 sigma problem (1984) reported tutoring about two standard deviations above conventional teaching. Critics cite time demands. See Bloom’s taxonomy.
Frequently asked questions
- Does everyone score 100?
- No; most reach a set mastery level.
References
- Carroll, J. B. (1963). A model of school learning. Teachers College Record, 64(8), 723–733.
- Bloom, B. S. (1968). Learning for mastery. Evaluation Comment, 1(2), 1–12.
- Bloom, B. S. (1984). The 2 sigma problem. Educational Researcher, 13(6), 4–16.
