Rob Pavey found Manning's Online Tuition:

• Significantly improves attainment“Improved grades in GCSE and A Level; increased confidence in students; greater engagement with parents and students; catch-up for students who have missed school.”
• Significantly builds student knowledge“Especially good with revision / over-learning of content covered in class.”
• Significantly reduces attainment gap“Difficult to isolate the effect, but generally very effective as part of a holistic plan.”
• Significantly improves teaching efficiency and productivity“Improves accessibility, and reduces social anxiety of having to meet a tutor in person.”
• Slightly reduces teacher workload“It is used to supplement, not replace; therefore neutral in terms of workload.”