A Year of Desirable Difficulties: The Impact of Interleaving Math Practice in Nigeria (doi:10.7910/DVN/BBS0SH)

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Document Description

Citation

Title:

A Year of Desirable Difficulties: The Impact of Interleaving Math Practice in Nigeria

Identification Number:

doi:10.7910/DVN/BBS0SH

Distributor:

Harvard Dataverse

Date of Distribution:

2026-03-31

Version:

1

Bibliographic Citation:

Gray-Lobe, Guthrie, 2026, "A Year of Desirable Difficulties: The Impact of Interleaving Math Practice in Nigeria", https://doi.org/10.7910/DVN/BBS0SH, Harvard Dataverse, V1

Study Description

Citation

Title:

A Year of Desirable Difficulties: The Impact of Interleaving Math Practice in Nigeria

Identification Number:

doi:10.7910/DVN/BBS0SH

Authoring Entity:

Gray-Lobe, Guthrie (University of Chicago)

Distributor:

Harvard Dataverse

Access Authority:

Gray-Lobe, Guthrie

Depositor:

Gray-Lobe, Guthrie

Date of Deposit:

2026-03-23

Holdings Information:

https://doi.org/10.7910/DVN/BBS0SH

Study Scope

Keywords:

Social Sciences

Abstract:

This paper tests whether increasing students’ exposure to “desirable difficulties” improves learning in real classrooms. In a year-long field experiment in Nigerian primary schools, interleaved math practice raised short-term test performance by 0.28 standard deviations but had no effect on cumulative end-of-year assessments. Gains were concentrated among lower-achieving students, while higher-achieving students saw little or no benefit. The results suggest that strategies that make learning more effortful can boost short-term mastery but may not produce durable improvements, highlighting the limits of applying laboratory-based cognitive interventions at scale.

Notes:

The data are anonymized.

Methodology and Processing

Sources Statement

Data Access

Notes:

<a href="http://creativecommons.org/publicdomain/zero/1.0">CC0 1.0</a>

Other Study Description Materials

Related Publications

Citation

Title:

Michael Kremer, Guthrie Gray-Lobe, Joost de Laat, and Lotte van der Haar, "A Year of Desirable Difficulties: The Impact of Interleaving Math Practice in Nigeria," NBER Working Paper 31853 (2023), https://doi.org/10.3386/w31853.

Bibliographic Citation:

Michael Kremer, Guthrie Gray-Lobe, Joost de Laat, and Lotte van der Haar, "A Year of Desirable Difficulties: The Impact of Interleaving Math Practice in Nigeria," NBER Working Paper 31853 (2023), https://doi.org/10.3386/w31853.

Other Study-Related Materials

Label:

difficulties_replication_package.zip

Notes:

application/zip