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

Publish Date: 24-06-1984

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Source: JSTOR

Author(s): Benjamin Samuel Bloom

Type: Literature/Paper

Synopsis: Individualized instruction lifted outcomes by 2 standard deviations — outperforming 98% of regular students. But “too costly for most societies to bear on a large scale".

Public Link: http://web.mit.edu/5.95/www/readings/bloom-two-sigma.pdf

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