It could be, as others are saying, that she's dumbing down to fit in, but putting this together with other things I recall you saying about her, I wonder if this may be more about home? Maybe she's feeling something like that she's expected to be brilliant but that she isn't good enough? It's clear from your word choice that you're feeling pretty frustrated with her, and your highly sensitive DD is obviously aware of that. Clearly you have to do something about the acute situation in this class, but I think I might be trying to deal with that in as low-key a way as possible, while giving her lots of lots of reassurance that she's loved and valued for herself, in ways that are not praise for anything and don't have anything to do with her being good at anything. I'm sure you're sending that message anyway, but it seems possible to me that she isn't receiving it.
