Overall, the evidence is consistent and strong, particularly for younger learners who are behind their peers in primary schools, and for subjects like reading and mathematics (there are fewer studies at secondary level or for other subjects). Effects on pupils from disadvantaged backgrounds also tend to be particularly positive.
Before you implement this strategy in your learning environment, consider the following:
One to one tuition is very effective in helping learners catch up, but is relatively expensive. Have you considered using Small group tuition instead and evaluating the impact?
Tuition is more likely to make an impact if it is additional to and explicitly linked with normal lessons.
Have you considered how you will support pupils and regular class teachers to ensure the impact is sustained once they return to normal classes?
For one to one tuition led by teaching assistants, interventions are likely to be particularly beneficial when the teaching assistants are experienced and well-trained. What training and support have you provided?
A number of one to one programmes delivered by teaching assistants have been rigorously evaluated and shown to be effective. If you are buying a programme, have you considered one of these?