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Visible Learning™
Visible Learning MetaX
Version 1.4 – Updated February 2026

Summer vacation length

Overview

  • Influence: Summer vacation length
  • Domain: School
  • Sub-Domain: Types of schools
  • Potential to Accelerate Student Achievement: Likely to have a negative impact
  • Influence Definition: The influence of different lengths and timing of the summer vacation on student performance upon return.

Evidence

  • Number of meta-analyses: 1
  • Number of studies: 39
  • Number of students: NA
  • Number of effects: 62
  • Weighted mean effect size: -0.09
  • Robustness index: 1

Meta-Analyses

Meta-Analyses
Journal Title Author Article Name Year Published Variable Number of Studies Number of Students Number of Effects Effect Size
Review of Educational Research Cooper, Nye, Charlton, Lindsay, & Greathouse The Effects of Summer Vacation on Achievement Test Scores: A Narrative and Meta-Analytic Review 1996 Summer vacation on achievement 39 NA 62 -0.09
TOTAL/AVERAGE 39 NA 62 -0.09
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