Math was never my strength, either. I know what you mean with the different teaching methods, too! Unfortunately, our school system seems to change methods every 2-3 years. It's a good thing my daughter seems to keep up with it because I don't understand what they're doing. I've never heard of Math U See. I'll have to look some info up on that one; I'm thinking it might be helpful for my sons, who struggle more with the subject.
Anyway, I hope she doesn't get too frustrated. I know this has got to be a super stressful time for her!! (And I hope Mom doesn't get too frustrated, either!!)