Tell all three of them to stay after class..

From the way she's looking at you, flaunting her delicious body, and the sight of her erect nipples, Rachel seems to be the best choice. You have yet to fuck one of your students in the ass today, so why not start with the best? You look at Vanessa, though, and are dying to know if the rumors surrounding her have any real basis. If not, then you might as well make them have some truth to them. As much as you want to slide your hand up Vanessa's skirt while shoving your dick in and out of Rachel's magnificent ass, you're also enthralled by the chance of getting Parker's tits and pouty lips wrapped around your cock. Your excited dick twitches at the thought of having any one of these seedy seniors.

You couldn't decide for a moment which of these girls you were going to tell to stay after class, but then you realized that you could just have them all. You don't have anything to grade and you can always give these nubile ladies excuse notes for their classes. Maybe you could get all twelve of the girls in French IV next time around.

With that thought, you watch the students funnel out into the hallway and say, "Rachel? Vanessa? Parker? Could you stay after class for a little bit? I have a project I need to discuss with you."