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  1. 41
    The Effect of Testing on Achievement: Meta-Analyses and Research Summary, 1910–2010. Source List, Effect Sizes, and References for Survey Studies
    by Richard P. Phelps
    Published 2011-01-01
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    Article
  2. 42
    The effect of testing on student achievement: 1910-2010
    by Richard P Phelps
    Published 2012-05-01
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    Article
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