One of my early tech jobs was working for a startup that created dynamic/randomized questions to go on a CD stuck in the back of text books. The same tech was used to create randomized online tests to go with the textbooks. Our biggest customer was Pearson, and once I realized the impact on students I was pissed. Completely eliminated sharing of books, and even simple things like group solving of problems since each student had unique problem sets.

Of course the same company fired me when I was fighting cancer, and then was acquired by Wimba. Oh and if T. Mack Brown reads this site, you can kiss my ass...