Well--she's a third grade teacher! I don't think that's so terrible. I'd hope she still has HS math proficiency at a basic level (I'm not sure what that is, TBH), but teaching is pretty different from doing.

(And I seriously doubt I could still DO trigonometry, for example, myself. I'd have to undertake some serious review. Yeah, I know. I'm going to have to brush up. Math is not my strength. Fortunately, DH is very good at it.)