I agree with what she is saying for the most part. I think that it is fine to introduce these ideas when the children are younger. Having these principles introduced throughout an elementary school class would provide the basic knowledge for future art students. When kids get older they understand these principles, but often these principles mix with each other and it's hard to focus your art on one specific principle. I think creating art should be about creating something you think is creative and passionate about. It's good to have focus and direction, but often the meaning gets lost when students are assigned something specific.
Post-modern principles - appropriation