Does grade retention help or harm students?
Evidence on grade retention is mixed and depends on how it is measured, with a Colombian study linking higher school retention rates to better exit test scores.
Covers: This page reviews evidence on the effects of grade retention on academic achievement, high school completion, and social-emotional outcomes. It does not cover specific intervention programs or policy implementation details.
3 free full reads left this month. Join or upgrade
The short answer
Interpretation AI-prepared starting mapThe evidence on grade retention is mixed and depends heavily on how it is measured. A natural-experiment study in Colombia found that when a rule capping school retention at 5 percent was abolished in 2010, higher school retention rates were associated with improved performance on high-school exit tests. Gains did not differ between STEM and non-STEM subjects, and the benefits fell disproportionately to students who were not retained, students from higher socioeconomic backgrounds, private schools, and schools on a full-day shift. A reference overview describes retention as repeating a grade after failing the previous year; in the United States it is used from kindergarten through third grade, while high-school students are usually retained only in the specific failed subject. Retention is most common among at-risk students in early elementary school, and children who are relatively young in their age cohort are four times more likely to be retained.12
- Evidence 8
- Interpretation 5
In brief
A Colombian natural experiment found that higher school retention rates went with better high-school exit test scores, with gains concentrated among students who were not retained.1
Evidence-backedThat study measures school-level retention rates, not the outcomes of the individual students who were retained, so it does not answer whether retention helps the child who repeats a grade.1
InterpretationRetention is most common among at-risk students in early elementary school, and children who are relatively young in their age cohort are four times more likely to be retained.2
Evidence-backedIn the United States, retention is used from kindergarten through third grade, while high-school students are usually retained only in the specific failed subject.2
Evidence-backed
At a glance
The picture in numbers
Live · updated just now
5%
5 in every 100
The evidence behind it
2 sources- Other studies and data1
- Background1
Published in 2026
| Source | Kind | Year |
|---|---|---|
| The effect of grade retention on secondary school performance: Evidence from a natural experiment. | Other studies and data | 2026 |
| Grade retention (Wikipedia) | Background | Unknown |
The community around it
- Contributions
- 0
- People
- 0
- Following
- 0
Nobody has added anything yet. Experience, evidence or a different view would show up here.
What it means for you
Which fits you?
Pick the situation closest to yours. Each answer says what it rests on.
If you are weighing retention for a child in early elementary school
note that retention is most common among at-risk students at this stage and that children who are relatively young in their age cohort are four times more likely to be retained, so age within the cohort is worth checking before deciding.2
Evidence-backedIf you are considering retention in high school
in the United States, high-school students are usually retained only in the specific failed subject rather than repeating the whole year, so the decision may apply to one course rather than the full grade.2
Evidence-backedIf you are looking for evidence that retention helps the student who repeats a grade
the available study measures school-level retention rates and exit test scores, not the outcomes of retained individuals, so it cannot confirm a benefit for the retained child.1
InterpretationIf you are deciding for a student with intellectual disabilities
retention is intended to happen only when parents and school officials agree, so parental consent is part of the process.2
Evidence-backedThe full story · 2 chapters
01
What the evidence shows
AI summary:A Colombian natural experiment links higher school retention rates to better high-school exit test scores, with gains concentrated among students who were not retained.
Evidence-backed: A study using a 2010 change in Colombian legislation — which abolished a rule allowing schools to retain at most 5 percent of students — compared schools whose retention rates changed over time. Higher school retention rates were followed by improved performance on high-school exit tests. The gains in learning did not differ between STEM and non-STEM subjects. The improvement disproportionately benefited students who were not retained, students from higher socioeconomic backgrounds, private schools, and schools operating under a full-day shift.1
Evidence-backed: Grade retention means a student repeats a grade after failing the previous year. In the United States it can be used from kindergarten through third grade; in high school, students are usually retained only in the specific failed subject, so a student might be promoted in math but retained in English. In elementary grades, where one classroom typically covers all subjects for the whole day, a student who fails or scores below the accepted level in most or all subjects may be considered for retention and then repeat the entire year's curriculum. Retention is most common among at-risk students in early elementary school, and children who are relatively young in their age cohort are four times more likely to be retained.2
In your view, what is the usual effect of retaining a student in the same grade?
Your individual response is private. Only totals are shown.
02
How to read these findings
AI summary:The Colombian result is about schools, not individual children, and the descriptive overview does not report how retained students fare afterward.
Interpretation: The Colombian result is about schools, not about individual children. A school with a higher retention rate may also change how it teaches, groups students, or allocates attention, and the study's own pattern — larger gains for non-retained students — suggests the benefits may come from the surrounding environment rather than from repeating a grade. The finding that private schools, full-day schools, and higher-socioeconomic-background students gained most also points to resources and context as part of the story.1
Interpretation: The descriptive overview explains who tends to be retained but does not report how retained students fare afterward. It notes that at-risk students with intellectual disabilities are intended to be retained only when parents and school officials agree, which signals that retention decisions for these students are treated as requiring consent rather than as a routine remedy.2
Ask this Sylo
Still wondering about something?
Answers come only from this page's reviewed material, with citations, and say plainly when the page doesn't cover it yet.
Behind this page
Who's adding to it, where it comes from, how it changed and what would make it better. Always open to everyone.
Discussion
Sources
Numbers match the citations in the article. A working link isn't proof that a page supports a claim; check the quoted passage and date.
- 1The effect of grade retention on secondary school performance: Evidence from a natural experiment.PloS one (Parra-Cely et al.)Published Mar 17, 2026Checked Oct 4, 2026
“We study the effects of grade retention on secondary school performance using a change in legislation in Colombia. In 2010, the rule that allowed schools to retain a maximum of 5 percent of their students was abolished. We exploit variation in changes in schools' retention rates across time in a difference-in-differences framework, and find that higher school retention rates improved performance on high-school exit tests scores. While gains in learning did not differ between STEM and non-STEM subjects, increased retention disproportionately benefited non-retained students, students from higher socioeconomic backgrounds, private schools, and schools operating under a full day shift.”
- 2Grade retention (Wikipedia)WikipediaPublished Oct 1, 2026Checked Oct 4, 2026
“Grade retention or grade repetition is the process of a student repeating a grade after failing the previous year. In the United States, grade retention can be used in kindergarten through to third grade; however, students in high school are usually only retained in the specific failed subject. For example, a student can be promoted in a math class but retained in an English class. Most elementary school grades (kindergarten through 5th grade) are taught all subjects in one classroom for the whole day, with exceptions in art and athletics. In these grades, the student who fails or scores below the accepted level in most or all subjects is to be considered for retention. If ultimately retained, the student will then repeat the entire school year's curriculum. Where it is permitted, grade retention is most common among at-risk students in early elementary school. At-risk students with intellectual disabilities are only intended to be retained when parents and school officials agree to do so. Children who are relatively young in their age cohort are four times more likely to be retained.”
How it changed
Published 1 time since Oct 4, 2026.
- Version 2Oct 4, 2026Live now
AI-prepared Starting Map from live research.
- First published version.
Help improve it
The brief is open about what's uncertain. These are the specific gaps that new material would fill.
“How to read these findings” has no evidence or firsthand experience yet
It's a synthesis for now. Evidence or experience would show whether it holds.
Open questions
Does being retained help or harm the individual student who repeats a grade, as distinct from the school-level effects measured in the Colombian study?
No answers yet
How does retention affect whether students finish high school?
No answers yet
How much do school resources, full-day schedules, and family socioeconomic background change the effect of retention?
No answers yet
Around this topic
Sylos connect: narrower topics report up to broader ones, so what's learned in one place shows up where it matters.