When I learned Canadian history, we mostly focused on the Pre-WWII formative years of the country. And it makes sense: in the era before WWII, we saw the trans-continental railway, all the rebellions, the definition of the economic activities in Canada's regions, and its temperance as a nation through WWI (where we did a bunch of important things like capture a hill, get slaughtered by foreign generals, and survive a gas attack.)
I didn't take them, but I've been told that the other history courses, American History and Modern History, go into much more detail about WWII, because it's really had far more of an impact on the world than WWI did. WWI was just a supersized European squabble for territory. WWII was a war of ideologies, which involved the depression, the failure of the League of Nations, and the result of extremism. As a result of the war, we have the modern world political system of the UN, the establishment of the third world, the hugely powerful atomic bomb, the establishment of America as a world power, now the only world power, and the establishment of the state of Israel.
I can see the issue with being taught WWII so extensively (I'd imagine all the "the allies took x point on x day") when it's really the fallout and the lessons we can learn from the war which are far more important. But I think that's more generally an issue with education. WWII really was far more important, it's the point at which we can say "this is what caused it, this is what came from it, this is what we can learn from it."