When I was studying math, a lot of times, I got to take tests at home. Prof would email me a copy of the test in LaTeX (they used it anyway), and I'd mail my answers back in LaTeX or PDF. Worked well for us. I'd just slip out the door on test days, walk the three blocks to my apartment, type up my answers, and mail them back.

In one case, one of my profs actually wrote his own textbook. It was for an intro to theorem proving / symbolic logic class. He also used LaTeX. While everyone else got a printout of the course text, I got a copy of the source code that I could read with a screenreader.