text: It varies province to province, DC Toronto. When Manitoba became a province Franco Manitobans were guaranteed the right to educate their children in French, out of which came the tradition, I guess, that French language education be provided by the Roman Catholic Church. In Quebec, I suspect the issue was rooted in the idea that education meant education by the Roman Catholic Church until that was changed. Saskatchewan and Alberta are different again. I honestly don't know about Ontario.
  
  I can provide no reference re. constitutions, though I have seen posts to this effect that seemed credible to me in earlier news stories about Roman Catholic schools. However, you may find interesting reading on the topic in books about the Ku Klux Klan in Canada in the late 1920s and early 1930s by, for example, William Peter Baergen and James M. Pitsula. One of the dominant issues that gave the KKK an opening was religiously structured education, and it was always policy, not constitution.