LibrariesHuman capitalPositive

Self-Selected Summer Books and Summer Reading Loss

University of Tennessee / University of Virginia (Allington et al.) · Volusia County, FL; Charlottesville, VA; Rochester, NY (USA) · 2007

Summary

The summer book experiments addressed summer learning loss — the well-documented phenomenon where low-income students fall behind over summer while higher-income peers hold steady or advance. The intervention was deliberately minimal: children simply chose books they wanted to read, with no instruction, no accountability, and no adult monitoring. The finding that this alone could prevent summer loss was significant, and the comparison to summer school was striking — similar effect sizes at a fraction of the cost. The mechanism appears to be access and choice: low-income children often have few books at home, and providing books they selected themselves (rather than assigned reading) sustained voluntary reading over summer. The cumulative three-year effect demonstrated that consistent book access during elementary summers has compounding benefits on reading achievement.

Research question

"Does providing low-income elementary students with self-selected books at the end of the school year prevent summer reading loss?"

Methodology

Intervention

At the end of the school year, low-income elementary students in grades K–5 were given the opportunity to select 12 books of their own choosing from a large collection (approximately 400 titles) to take home for the summer. No summer school, tutoring, or structured reading program was involved — only access to self-selected books.

Assignment

Randomized controlled trial across three sites over four consecutive summers; students within schools randomized to book access or control

Sample size

Approximately 4,000 students across three research sites over multiple years

Primary outcome

Reading achievement scores in fall (Florida Comprehensive Assessment Test, Virginia SOL, New York State ELA assessments) compared to spring baseline

Effect estimate

Book access prevented the typical 2–2.5 month summer reading loss in low-income children; effect was equivalent in size to attending summer school; cumulative effect over three summers was approximately 0.2 SD advantage in reading achievement

Decision

Findings have influenced summer book distribution programs in multiple US states and school districts; the low cost of the intervention (approximately $50 per student for 12 books per summer) compared to the $800–1,500 cost of summer school programs has made it attractive to administrators; some districts now partner with public libraries to run self-selected summer book programs

Result

Positive

Book access prevented the typical 2–2.5 month summer reading loss in low-income children; effect was equivalent in size to attending summer school; cumulative effect over three summers was approximately 0.2 SD advantage in reading achievement

Evidence strength

Strong

Randomized trial, replicated across multiple sites or studies.

Replication status

Replicated

Institution

University of Tennessee / University of Virginia (Allington et al.)

Location

Volusia County, FL; Charlottesville, VA; Rochester, NY (USA)

Year

2007

Policy area

Libraries

Mechanism

Human capital

Related experiments

Tennessee, USA · 1989

Project STAR — Small Class Size

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Wales, UK · 2007

Universal Free School Breakfast Program

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Chicago, USA · 2019

Library Fine Elimination

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Mentioned in the Dispatch

Issue 14 · June 14, 2026

What summer does to reading.

Low-income children lose two months of reading skill every summer. Giving them twelve books of their own choosing costs fifty dollars and prevents it.

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