Students own the copyright in the works they create, so you may only copy and distribute such works with their permission. The University does have the right to make copies of student works for academic purposes, but this right does not extend to making them available online. Accordingly, you should ask students in advance whether they give permission for their work to be posted online and keep written records of the permissions given. 

The Copyright Advisor (mrucopyright@mtroyal.ca) has a form you can use to seek permission from students. Fair dealing or another user right under the Copyright Act may still apply to your use of a student’s work.