The context of the following conversation is After catching them cheating together on the exam, Jan gave them an F.:
Jan says I caught two of my students cheating together on an exam last week..
The friend responds How'd you catch them?.
Jan responds They were so obvious!  I think each of them had studied half the material and they were passing notes to one another with answers they knew on them.  I caught them passing a note..
The friend responds So what did you do?.
Jan responds I gave them both Fs on the exam and sent them out of the room.  I am going to give them a chance, but the best they can do now, is a C in the class..
The friend responds Hopefully they will have learned something from this..