At the beginning of the semester, in my 105 classes (and sometimes, to a lesser degree, in 106), I make sure to emphasize that the writing expected from students at university level will be substantially different from what they likely were asked to produce in high school. Rather than giving them a long list, I usually introduce the differences piecemeal, in a hopefully organic manner that arises from the subject matter that we are dealing with in class.
However, I have been looking for such a list, to bolster what I mention in class and to serve as a handy reminder. I just came across one on the University of Toronto website here, which hits on virtually everything that I would want it to. It’s also available as a printable PDF and free to print and distribute, according to their Fair-Use policy.
Hopefully other people will find it useful too.