While it's true that parents do need to provide part of the differentiation, the teacher also appears to be part of what I've all too often observed, if it causes them more work, they're quick to try and avoid it.
I've yet to see a school that can effectively meet the differentiation needs of a GT student with the resources available, expect to be a strong part of the solution by providing opportunities outside of school, however, when a teacher / school tries to completely shift that responsibility to others, there is something very wrong.
