May I change schools?
You must be in attendance of an approved type of institution. Whether or not you may change schools depends on the Terms and Conditions attached to your Student Authorization. You are generally allowed to switch fields of study and the institution within a degree or diploma program. If you wish to change from one type of educational institution or from a degree or diploma program to another, however, you are required to obtain a new authorization. In case of doubt, phone your nearest Canada Immigration Call Centre in Canada to obtain clarification.
Page Link: http://www.cic.gc.ca/english/coming/imm5269e.html