If you want to take physics at Ryerson you need to do several things first:
1) you need to sign a paper, get the signature of the physics departmental head and your departmental/faculty head. (you need to get that paper/permission letter from your department i think; just go to your department and they will give it to you. Or it might be available online for students)
2) you need to take that paper to the uni you want to do summer school at and they need to sign it and approve it.
Now along the way, i am not entirely sure, but i know that for mac you need to apply through the ouac..but not sure if that's the case with Ryerson. That's what i remember from my friend who took a summer course at mac. Just go to your academic advisor and most likely they will be able to help you out and give you additional details!
Here's more info about the letter of permission (LOP):
http://www.science.mcmaster. ca/ass...2/letters.html