If you're engaging a tutor for a school student, the answer will depend on the student’s specific needs, current level and goals. Evidence for Learning (2020) believe that optimum impact is achieved in one-to-one tutoring where short (roughly 30 minute) regular lessons are completed 3-5 times per week (i.e. 1.5-2.5 hours per week) over a set period of time. Our data suggests this is most suitable for younger and primary school tuition, whereas Year 11-12 tuition tends to be longer (1-1.5 hours) lessons and should occur 1-2 times per week.