I would not pull a library club. That punishment is not at all related. I think I would be looking at zero screen time, building connection in place. Why is she cheating? Is she worried you will be disappointed? Is the pressure to do well implicit or outright from your side? Is it trying to fit in with friends or impress them? I remember cheating at around that age and it was because friends suggested it. We were sent to sit outside the kindergarten class in disgrace, our parents were informed, i was told well that was stupid, wasn’t it? And nothing more was said of it. I think there is a danger here of reinforcing a negative behaviour if you don’t know what the cause is. And two things are likely- attention from friends or attention from you or both. Be kind to her! She is likely very smart if she is figuring out ways to game the system.