a) Stare at them with the exams in your hands until they shut up.
b) Give them the precise time when they will be listening to the CD for the listening test.
c) Give them the date and insist that the exam must be done in pen, not pencil (yeah, I know, but believe me, it must be done).
d) Deliver the exams once and only once there is total complete silence in the classroom.
e) Once the exams are on the table, patiently explain how to do absolutely every question in the test. Include the total number of points and how many points they need to pass.
f) Refuse to say any other word for the remainder of the hour. Believe me, this is hard. But I've become the Mime from Hell.
g) The Amazing Fed-up-o-Meter (Aguantómetro). This has been intelligently described by one student today thus:
"Mira, ese es el aguantómetro de la profe. Primero va a por el boli rojo. Luego, le quita el capuchón. Y luego, te quita un punto."
"Look, that's the teacher's fed-up-o-meter. First she goes for the red pen. Then, she takes off the lid. And then, she takes off one point"
That was so accurate I had a seriously hard time trying not to laugh. I told you, (f) is hard.