Hugh found Twig World:

• Moderately improves attainment“It engages some students who otherwise find concentration a problem. It is also useful for stretching the more able children.”
• Moderately builds student knowledge“There are lots of films that sit slightly outside the mainstream syllabus which allows the boys to explore around a given topic. The way the videos are presented, as a web with the most relevant material near the centre, helps the children to focus on core ideas or to spread their wings a little more widely.”
• Slightly reduces attainment gap“I have not done a comparison, so the honest answer is that I don't know. Twig has become as much a part of my teaching Y5 to Y8 as any other school resource. It was used a lot during remote learning to set tasks for pupils and I use it in class and during private study sessions. I don't use any text books so it is one the ways that I support the notes I produce for the students - I do know that they are always very happy to use Twig.”
• Slightly improves teaching efficiency and productivity“Again, I have not tested this and 'teaching efficiency' is not a phrase we often use. It is a little utilitarian. At the age group with which we work, there is more emphasis on engaging/enthusing and less on achieving any specific set of goals.”
• Significantly reduces teacher workload“It has been a life saver when one of my colleagues was away from school. It allowed me to set structured lessons around a body of information set by Twig so that follow up tasks could be completed. It removed the need for a specialist to cover the missed lessons and ensured that the students remained confident that they were making good progress. I am sure that it reduced grumbling!”