It depends on how you're getting to a school in Poland.
If you're going on your own without your Canadian school sponsorship then you may as well establish an official residence in Poland and be covered by Polish health insurance.
If your studies in Poland are in co-operation with your current Canadian university (student exchange through ISEP for instance) then the university will be able to advise. That's what my daughter has done. She also has multiple passports. We paid her health insurance and it cost somewhere around $500+ US for one academic year.
hey zosia, arent you z_dariusz's daughter?
I don't think so.
My daughter arrived in Wroclaw just over a week ago.