Has anyone made something (an add on? maybe) that reminds people to publish their content?
A pop up dialog, just after the first save would be nice.
I know I can use a rule and send a mail, which I currently what I now use to get an email and then email the user and ask if he forgot to publish the content).
The users are teachers, so it needs to be simple 
Send the email to the user instead of yourself?
Solves the problem on your end 
I guess it should be fairly easy to add a viewlet just above the content and check if the user can edit the content and if it's published. Then in the template you go "<marquee>PLEASE PUBLISH ME</marquee>"
I can't use the mail because they sometimes borrrows login (Yes, I know....)