Personally, I know of only one high school on reserve, and I don't believe it's funded as a high school. It's on the Wikwemikong unceded Indian reserve that's located on Manitoulin Island. I believe they do have some fundamental programs in math and physics.
But again, with the way the school system is set up, your high school is pretty well predetermined before you even get in the front door when you're embarking on your high school journey. Most of the children in Ontario are sent off reserve for high school. Not only are they dealing with their educational journey, but they also have to deal with culture shock and racism. They have to deal with a number of things.
They have access to the same programs that every other Canadian has access to, but do they have that same opportunity? I do not believe so.