All year 12 students at the exclusive Xavier College in Melbourne have been booted out of the private school on the eve of exams because of disciplinary issues.

The decision, which affects about 250 students at the prestigious all boys independent Catholic school, apparently follows an unruly ball game in which a student was injured on Monday.

The boy, 17, was taken to the Epworth Hospital with multiple fractures, a hospital source said.

An Ambulance Victoria spokeswoman said paramedics took a boy from the school's Kew senior campus to the hospital following a fall. The boy was in a stable condition.

Xavier's director of development, Graham Sharp, issued a statement confirming the disciplinary action.

"Unfortunately during lunchtime today (Monday) a large number of Year 12 students exhibited unacceptable behaviour and as a consequence the decision was taken to cancel classes this afternoon, tomorrow and Wednesday," the statement said.

"The decision was taken in the best interest of students at all levels."

Students have been told they are not welcome at the school this week but can contact their teachers by email and can meet them during the pre-exam study period.

- AAP