Funny you should mention the schools grading themselves. I'm a student at an AcadeMedia school, and they gave us a form to rate our education experience, along with this instruction on how to rate. For non-English speakers, they are basically asking us to rate outside of a linear 1-10 scale an instead follow theirs (which is biased towards higher ratings) presumably to look good on internal reviews. If this is somehow shown to their investors, I think the media should take this up.