I've been emphasizing DD7's attitude when she faces challenging work. If she gets frustrated but presses on, I point out how great that is and how it will help in life.
I tell her we all face problems and the most important thing she's learning is not how to do the math problem du jour(she's more verbal)but how to break problems down into smaller pieces and find similarities to other problems she already knows how to solve. This has helped her persevere.
I've also pointed out things that she used to think were hard but are now easy because she worked through her frustration. The side benefit is the more I tell all of this to her, the more I believe it for myself too.
