WHAT WORKS
Task, subject, strategy
The Education Endowment Foundation says effective feedback focuses on the task, the subject and self-regulation strategies, and gives specific information on how to improve.
Check a comment
GIVING FEEDBACK
Feedback is powerful, but it can backfire.
UK education evidence rates feedback as high impact for very low cost. A classic review of feedback studies also found that over a third made performance worse. The difference is mostly about where the feedback points attention.
+6 months average progress
Check a commentTHE SHORT ANSWER
The best feedback tells someone how to improve the work in front of them.
Praise for the person tends to do least.
WHAT WORKS
The Education Endowment Foundation says effective feedback focuses on the task, the subject and self-regulation strategies, and gives specific information on how to improve.
Check a commentWHAT BACKFIRES
Feedback about someone as an individual tends to be the least effective, the EEF says. A 1996 meta-analysis found effects fall as attention moves towards the self.
Why it backfiresCLOSING THE LOOP
EEF guidance says teachers should give pupils chances to use feedback. Only then is the feedback loop closed so learning can move on.
Four habits
FOUR HABITS FOR USEFUL FEEDBACK
These follow the EEF's principles for teachers, but they work for any drawing, essay or project you are asked to look at.
Be clear about what the work is aiming for, so feedback can target the specific gap between where it is and where it is going.
Comment on the task, the subject or the strategy used, with a specific way to improve, rather than on the person.
The EEF stresses giving feedback when things are correct, not just when they are wrong.
Feedback only moves learning on if there is a chance to use it.
TWO NUMBERS WORTH KNOWING
One figure for the average benefit,
one for how often feedback makes things worse.
+6 months
Average extra progress from feedback
The EEF rates feedback as high impact for very low cost, based on extensive evidence. Effects are slightly higher in primary (+7 months) than secondary (+5 months).
SCHOOLS · EEF
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Feedback interventions that lowered performance
Across 607 effect sizes and 23,663 observations, feedback improved performance on average, but over a third of interventions made it worse.
META-ANALYSIS · 1996
The 1996 review, by Kluger and DeNisi in Psychological Bulletin, found the negative effects could not be explained by sampling error or by whether the feedback was positive or negative.
A QUICK COMMENT CHECK
Pick a kind of feedback to see what the evidence says about it. The bar shows how likely it is to help.
Based on the EEF Teaching and Learning Toolkit and its guidance report Teacher Feedback to Improve Pupil Learning. Figures are for school pupils.

WHY FEEDBACK BACKFIRES
Kluger and DeNisi proposed that feedback shifts attention between three levels: the task itself, motivation for the task, and processes about the self. Their results suggest feedback becomes less effective as attention moves up towards the self and away from the task.
The EEF notes another cost: large amounts of time go on giving feedback, and some written forms carry a significant workload. Its guidance says the method, written or spoken, matters less than following the principles of good feedback.
Questions
Yes, on average. The EEF says feedback has a high impact on learning outcomes for very low cost, adding about six months' progress, based on extensive evidence.
Yes. A 1996 meta-analysis of 607 effect sizes found feedback helped on average, but over a third of feedback interventions decreased performance.
Feedback about the person tends to be the least effective, the EEF says. It does stress giving feedback when work is correct, focused on the task.
Studies of verbal feedback show slightly higher impacts (+7 months), but the EEF's guidance says the method matters less than following the principles of effective feedback.
The EEF says feedback can work during, immediately after or some time after learning, and that policies should not over-specify how often it is given.
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