>Professors are paid generous salaries to share knowledge with the paying customers of the University (students). So, let’s find some paid unpaid University knowledge on how to change a tire by using our new trick!
But the bottom of the page says
>Prepared by: [students] For Dr. Bruce Magee's English 303 (Technical Writing) Class, Winter 1997-1998.
The professor is actually an English professor and the page was written by students as an assignment. I looked into this because I was wondering, "what would a professor be teaching that he's writing notes on tire changing?". There's probably some professor out there that does that in an academic context, but there's probably a lot of things that no professor actually gets paid to write about. Maybe they would write about something miscellaneous like that anyway and put it online, but they would be doing so out of the culture of web savvy professors having personal pages where they upload stuff they think is helpful.