No I don't usually send home for just a fever unless they are miserable and some other symptoms are with it where I feel like I can't give them the attention they need.
fever could just be teething so it would be silly to send home for that.
Most of my parents send Tylenol in the supplies and sign a release saying I can administer if needed. I would probably give a dose and then see how it goes. If things don't get better or there is any other symptom than I would contact the parent.
Just a fever -- probably not.
Good luck with your afternoon