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Switch on evaluation

Primary children sitting
Researchers: Rakhee Patel
Published: May 2017

Evaluation of an intervention to improve the literacy levels of Year 3 children.


To test the effectiveness of the Switch-on intervention in accelerating the literacy learning of pupils. The target group is Year 3 children working below age related outcomes at the end of Key Stage 1.

Switch-on is an intensive 10 week literacy intervention. It is delivered on a one to one basis by teaching assistants who have been trained in the approach.

The Education Endowment Foundation has commissioned us to carry out an independent evaluation of this trial.

You can download the report here.


The evaluation includes an impact evaluation and a process evaluation. 

Impact evaluation:

Schools will be randomly assigned to one of three groups, one group will receive the writing and reading intervention, another just the reading intervention and the third is a control group. At the end of the trial, all Year 3 pupils will be tested on their reading progress which will be compared against pre-intervention scores obtained from National Pupil Database records.

Process evaluation:

This evaluation will provide a detailed understanding of how Switch-on might be delivered in schools around the country. The process evaluation consists of a number of components including interviews with school co-ordinators, TAs and Switch-on Trainers.