GPT-4 tutoring in Nigeria boosted English learning by 0.23 standard deviations
paulnovosad · x · 2026-08-04
GPT-4 tutoring in Nigeria lifted English scores by 0.23 SD
A randomized controlled trial in Nigeria tested a six-week virtual tutoring program for first-year senior secondary students using Microsoft Copilot powered by GPT-4.
Key results:
- Overall assessment score improved by 0.31 standard deviations
- The main English outcome improved by 0.23 standard deviations
- The gains were described as highly cost-effective, equal to roughly 1.5 to 2 years of business-as-usual schooling
- Benefits appeared across the ability distribution, with the largest gains for female students and those who started with stronger academic performance
The authors conclude that well-designed AI tutoring can have transformative effects in low-resource education settings.
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