we've noticed this too. since in class they're still counting to 20, my DD5 begged for an online Math programme and she's been flying along with it. each lesson has 10 problems - she generally gets about 4 correct in a row before feeling like she's mastered the concept, and then she invariably wants to switch to something new. when she comes back to the original section, she freaks out because the programme won't let her move on without a) going back and doing the first few over again and b) actually completing the lesson. it's a simple limitation of the online programme, but... ha - it's not like her teachers are any more flexible.
so we've used various tricks to get her to see all of this in a different way, all of which take advantage of her personal currency. she really likes to know her brain is growing - so we've emphasized how much more her brain grows when she's doing something challenging. the repetitive problems themselves aren't challenging, but something about the situation is, or she would just power through it... so we get her to focus on that part - that she's growing her grit/resilience/patience/whatever and as a bonus, she will actually get to move on to the next level, which is what she wanted anyway!
good luck!
