Extending school time

Moderate impact for moderate cost based on limited evidence
The cost estimates in the Toolkits are based on the average cost of delivering the interventions.
Implementation cost
This rating provides an overall estimate of the robustness of the evidence, to help support professional decision-making in schools.
Evidence strength
The cost estimates in the Toolkits are based on the average cost of delivering the interventions.
Number of studies
The impact measure shows the number of additional months of progress made, on average, by children and young people who received the intervention, compared to similar children and young people who did not.
Impact (months)

What is it?​

This summary focuses on extending core teaching and learning time in schools and the use of targeted before and after school programmes. Other approaches to increasing learning time are included in other sections of the Toolkit, such as HomeworkEarly years intervention and Summer schools.

The research focuses on three main approaches to extending teaching and learning time in schools:

  • extending the length of the school year;
  • extending the length of the school day; and
  • providing additional time for targeted groups of pupils, particularly disadvantaged or low-attaining pupils, either before or after school. 

How effective is it?

The evidence indicates that, on average, pupils make two additional months’ progress per year from extended school time and in particular through the targeted use of before and after school programmes. There is some evidence that disadvantaged pupils benefit more, making closer to three months’ additional progress. There are also often wider benefits for low-income students, such as increased attendance at school, improved behaviour, and better relationships with peers.

In addition to providing academic support, some school programmes aim to provide stimulating environments and activities or develop additional personal and social skills. These programmes are more likely to have an impact on attainment than those that are solely academic in focus. However, it is not clear whether this is due to the additional activities or to improved attendance and better engagement.

The research also indicates that attracting and retaining pupils in before and after school programmes is harder at secondary level than at primary level. To be successful, any increases in school time should be supported by both parents and staff, and extreme increases (for example more than nine hours of schooling per day in total) do not appear to be additionally beneficial.

How secure is the evidence?

The evidence is moderately secure. Decisions to lengthen the school year or school day are often one component of wider approaches to school reform. This makes attributing any learning gains to the additional time itself difficult. Gains are not consistent across studies, indicating that additional time alone is not enough — it must be used effectively. Discrete or targeted programmes are more likely to have been evaluated robustly than other ways of extending learning time, and even here there is substantial variation in impact.

Most of the evaluations of extending school time come from the USA. The reviews all note the need for more rigorous evaluations with outcome measures that demonstrate direct impact on learning.

What are the costs?

The costs are estimated as moderate. This involves economic efforts that vary by country and by educational level due to the differentiated costs between primary and secondary education. Another cost to consider is the training of educators to work extra-programmatic activities in addition to school hours.

What should I consider?

Before you implement this strategy in your learning environment, consider the following:

  1. Planning to get the most from the extra time is important. It should meet pupils’ needs and build on their capabilities.

  2. After school programmes with a clear structure, a strong link to the curriculum, and well-qualified and well-trained staff are more clearly linked to academic benefits than other types of extended hours provision.

  3. After school programmes could give the opportunity to carry out some more intensive tuition (see entries for One to one or Small Group Tuition)

  4. Enrichment activities without a specific focus on learning can have an impact on attainment, but the link is not well-established and the impact of different interventions can vary a great deal (see entries for Sports or Arts participation

  5. Have you explored how the quality of teaching and learning during school time can be improved? It might be cheaper and more efficient to try introducing more evidence-based programmes or practices into the existing school day first.




Technical Appendix




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