I was commenting on what I see in University classes, usually on specialized topics. I agree it would be different from what you see in high school.
*I'm having trouble getting the link to work, because there are square brackets in the url.
Put it in the form [url]
http://...stuff...[/url];, except replace every internal (part of the url) '[' with '%5b' and replace every internal ']' with '%5d'.