Has your teacher not given you a list of like 80 different common questions?
They'll probably start with something easy like:
-Parlami della tua famiglia
-Quali sono i tuoi interessi?
-Che cosa studi a scuola?/Quali sono le tue materie?/Ti piacciono le tue materie?
-Ti piace la scuola?
-Che cosa hai fatto il weekend scorso? (I hate this question! Ummm... STUDIED! DUH! We have trials, and this speaking exam!!)
And then the conversation moves from there based on what you say in response to that question.