Bring a roll of toilet paper with you to school.
Tell your students that you really want to get to know them and that the most effective way is by showing how much toilet paper they use at toilet time.
When everyone is through taking (including you) let them tear off the squares and count how many pieces they have.
Starting from the back of the class, each student has to say something about themselves that they want to share with the class. Each point deserves a square. The trick is that the more tissue squares they have, the more they will have to reveal.