I would think that most if not all of the cases are due to non-classroom exposure. TCU is coed: if religions promising hell-fire, disapproval of parents and friends and serious diseases(for young adults) cannot prevent boy-girl physical interaction, a disease which so far has not been generally serious for young adults, keeping 18-23 YO, men and women from close "social interaction", is virtually impossible.
Going to electronic media classes if the students remain on campus would be a waste of resources.
The main thing is keeping the covid cases from leaving campus. No hugging mom, dad or grandparents for a while, kids.