Those are problems your wife has inflicted on herself. If she wants less grading stop assigning so many complicated assignments. If she doesn’t want to think about work, then she should try to care less.

From my experience with friends who are teachers, especially at high school level, there’s no teaching job with built in work-life balance. You must create it through your curriculum and teaching style.

Or like I said, she could just quit and be a stay at home mom. There’s other ways to meet your financial goals.