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The Long-Term Distributional Impacts of a Full-Year Interleaving Math Program in Nigeria

Author

Listed:
  • Lotte van der Haar
  • Guthrie Gray-Lobe
  • Michael Kremer
  • Joost de Laat

Abstract

This study reports the findings from a year-long randomized evaluation assessing the impact of assigning 62 classrooms in Nigeria to receive either blocked or interleaved math problem sets. Blocked practice sessions focused on a single skill at a time. Interleaved problem sets alternated between different skills within a practice session. On tests of short-term retention, interleaved practice increased test scores by 0.29 standard deviations. In contrast, we find no evidence that interleaving improves average performance on a cumulative assessment measuring retention of material over the academic year. We find some evidence of large impacts on the cumulative assessment at the bottom of the distribution, but these impacts appear to be offset by negative impacts at the top.

Suggested Citation

  • Lotte van der Haar & Guthrie Gray-Lobe & Michael Kremer & Joost de Laat, 2023. "The Long-Term Distributional Impacts of a Full-Year Interleaving Math Program in Nigeria," NBER Working Papers 31853, National Bureau of Economic Research, Inc.
    • Handle: RePEc:nbr:nberwo:31853
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    More about this item

    JEL classification:

    • I20 - Health, Education, and Welfare - - Education - - - General
    • I21 - Health, Education, and Welfare - - Education - - - Analysis of Education
    • I24 - Health, Education, and Welfare - - Education - - - Education and Inequality
    • I25 - Health, Education, and Welfare - - Education - - - Education and Economic Development

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