Here is the answer to your question: From CIC.GC.CA
I want to change my school or program of study. How can I change my study permit?
New rules for prospective international students are now in effect (as of June 1, 2014).
Read about these changes and how they may impact you.
Primary school student
•You must apply to modify your study permit when you move on to high school. Send your application to the CIC Case Processing Centre in Vegreville, Alberta.
High school student
•You must apply to modify your study permit when you move on to post-secondary school. Send your application to the CIC Case Processing Centre in Vegreville, Alberta.
Post-secondary student
•You may change your school, program, field of study or level of study (e.g. from the Bachelor level to the Masters level) without applying for a new study permit. You do not need to apply for a change to the condition of your study permit, either. You may continue to use your study permit as long as it is valid.
I hope this helps!