I agree with Jemima – quizzes are engaging but they can become very repetitive if they are used too much. Good quality feedback is really important. Also accuracy in the answer key is crucial – the signposting exercise in week 5 review????
Challenges? – I think time is the biggest challenge – both as a teacher making them and as a student doing them. Also, over the course of a year I think it is difficult to come up with a range of quizzes that don’t feel like a hamster wheel for the students. I think making the purpose clear for students – and maybe letting them decide whether it is something worth investing their time in doing (learner control) is important. So an element of TTT where feedback suggests further activities based on scores is perhaps helpful.