A series of revision quizzes. I give students 10 minutes at the start of the lesson to try to complete the quiz. Anyone completing the quiz within the available time gets a score based on the amount of minutes left on the clock. They can then move on to the first lesson task, whatever that happens to be, whilst the other members of the class continue to play. I build up a ‘leaderboard’ of scores over the numerous lessons we have during revision time to build up momentum!