how do a let users add a link in a submission, similar to attaching a file?
I want teachers who want to list a link to a website, be able to insert a link. how?
Have them type it into a text field. That would be the only way to collect it.
would it be a good idea to send a shortcut to desktop from explorer, and then upload that as a file attachment? will that work for most people?
That wouldn't work. The shorcut isn't a file so you couldn't choose it.