Evidence for Learning: Feedback


Very high impact for very low cost based on extensive evidence
Implementation cost
Evidence strength
Impact (months)

Feedback is information given to the learner about the learner’s performance relative to learning goals or outcomes. It should aim to (and be capable of producing) improvement in students’ learning.

Feedback redirects or refocuses the student’s actions to achieve a goal, by aligning effort and activity with an outcome. It can be about the output or outcome of the task the process of the task the student’s management of their learning or self-regulation, or about them as individuals (which tends to be the least effective).

This feedback can be verbal or written, or can be given through tests or via digital technology. It can come from a teacher or someone taking a teaching role, or from peers (see peer tutoring).

1. Providing feedback is a well-evidenced and has a high impact on learning outcomes. Effective feedback tends to focus on the task, subject and self-regulation strategies: it provides specific information on how to improve.

2. Feedback can be effective during, immediately after and some time after learning. Feedback policies should not over specify the frequency of feedback.

3. Feedback can come from a variety of sources ­– studies have shown positive effects of feedback from teachers and peers. Feedback delivered by digital technology also has positive effects (albeit slightly lower than the overall average).

4. Different methods of feedback delivery can be effective and feedback should not be limited exclusively to written marking. Studies of verbal feedback show slightly higher impacts overall (+7 months). Written marking may play one part of an effective feedback strategy – but it is crucial to monitor impacts on staff workload.

5. It is important to give feedback when things are correct ­– not just when they are incorrect. High-quality feedback may focus on a task, subject, and self-regulation strategies.

Feedback studies tend to show high effects on learning. However, there are a wide range of effects and some studies show that feedback can have negative effects and make things worse.

There are positive impacts from a wide range of feedback approaches – including when feedback is delivered by technology or peers. Impacts are highest when feedback is delivered by teachers. It is particularly important to provide feedback when work is correct, rather than just using it to identify errors.

Many studies of feedback also include other practices. For example, mastery learning approaches combine feedback with additional support for students that are falling behind, while approaches like formative assessment also include work to understand specific gaps in learning that need to be addressed and how the teacher wants the student to progress.

Feedback has effects across all age groups. Research in schools has focused particularly on its impact on English, mathematics and, to a lesser extent, science.

Embedding formative assessment explicitly can be a key component of laying the foundations for effective feedback. The EEF has trialled Embedding Formative Assessment’ in English schools and found a positive impact, on average.

Feedback is widely used as a teaching and learning intervention in schools in Australasia. While the global evidence base on the impact of feedback on learning is extensive, more research examining the implementation and impact on learning of feedback in Australasian schools is required. New Zealand studies on feedback indicate that it impacts positively on learning, students’ ability to give peer feedback, and academic outcomes at primary level.

  • Feedback appears to have slightly greater effects for primary school age students (+7 months) than for secondary (+5 months).

  • Effects are high across all curriculum subjects, with slightly higher effects in mathematics and science

  • Low achieving students tend to benefit more from explicit feedback than high achievers.

  • Although some studies have successfully demonstrated the benefits of digital feedback, effects are typically slightly smaller (+ 4 months).

There is evidence to suggest that feedback involving metacognitive and self-regulatory approaches may have a greater impact on disadvantaged students and lower prior achievers than other students. Students require clear and actionable feedback to employ metacognitive strategies as they learn, as this information informs their understanding of their specific strengths and areas for improvement, thereby indicating which learning strategies have been effective for them in previously completed work.

Feedback may have a positive impact through supporting students to focus future learning on areas of weakness, through identifying and explaining misconceptions, through supporting them in taking greater responsibility for their own improvement or through increasing students’ motivation to improve.

Implementing feedback successfully will require:

  • communicate with students, teachers, and parents, about practices and expectations that relate to feedback policies,
  • assessing student understanding, so that you know what needs to be improved,
  • consider the opportunity cost’ associated with different feedback practices,
  • ensuring that feedback can be acted upon, for example through including specific information on what a student has done successfully or not, assisted with an explanation as to why,
  • carefully considering how feedback will be received, including impacts on self-confidence and motivation,
  • providing opportunities for students to act-upon the feedback after it has been given,
  • evaluating how effective the feedback has been.

Feedback interventions vary in length. Some function as short, targeted approaches that address student misconceptions within the space of weeks or even days. Alternatively, others are used as more extended methods of tracking and supporting student progress over many months.

When introducing new approaches, schools should consider implementation. For more information see Putting Evidence to Work – A School’s Guide to Implementation.

The average cost of feedback and feedback interventions is very low. The cost to schools is largely based on training.

Implementing feedback and feedback interventions will also require a moderate and sustained amount of staff time, compared with other approaches.

Alongside time and cost, school leaders should consider how to maximise teacher professional development in supporting them to deliver effective feedback and avoid approaches that increase teacher workload without providing students with the necessary information to improve performance.

The security of the evidence around feedback is rated as high. 155 studies were identified that meet the inclusion criteria of the Toolkit. Overall, the topic lost one padlock because a large percentage of the studies are not randomised controlled trials. While other study designs still give important information about effectiveness of approaches, there is a risk that results are influenced by unknown factors that are not part of the intervention.

As with any evidence review, the Toolkit summarises the average impact of approaches when researched in academic studies. It is important to consider your context and apply your professional judgement when implementing an approach in your setting.

Evidence strength
Number of studies155
Review last updatedJune 2021