Thank you for the information, Valka.
As for the comparison between the United Kingdom and Canada, that was more because both, like the US, are multinational states rather than for any past or current relationship between the two. Canada was a convenient additional example of a decentralized school system in a multinational state that I am at least passingly familiar with.
One could contrast the UK/Canada/USA decentralization with Belgium's system which is, I guess, more centralized despite having very strong national identities within the multinational state.