As soon as learners begin to comprehend and apply the science theory, they will begin to get more answers correct. This can initiate a ‘snowball’ effect. The more questions they get correct, the more motivated and confident they will become. During this process the tutors’ role is very important. They give positive reinforcement and ensure that the learners only attempt problems they are ready for. As the learner becomes more accustomed to the system and their science foundation has improved, they learn to work more independently and the ‘light bulb’ moments will become more frequent.