22 Strategies

Abstract

Chapter Nine, “22 Strategies,” evaluates the major policy interventions that have been proposed to address the achievement gap. The key finding is that a technology-based intervention that individualizes task difficulty, provides rapid performance feedback, and is based on the theory of the achievement gap described in this book is dramatically more cost-effective than any of the other 22 interventions for which data are available. This result offers key evidence supporting the proposed theory of the achievement gap. The efficiency of this approach implies that the underlying theory is correct because it is unlikely that an incorrect theory could produce an efficient solution.