Roy Harding said:
The St Lawrence Seaway fits into the last category - "history from 1600 - present".
As an aside, I graduated from high school five years ago, and would say that looking holistically upon my whole time up to Grade 13, Canadian history is the most poorly taught of all subjects. In a nutshell, here what was taught to me:
1. Canada was first settled in the early 1600s.
2. There were French-English struggles.
3. We kicked the Americans' asses in the War of 1812.
4. Mention of Wilfred Laurier.
5. A short mention of the causes of WW I. During the war, Canada was gassed during Ypres, but was lucky enough to win a little battle at Vimy Ridge. Nothing was mentioned of the significance of Vimy Ridge, and if you read between the lines of textbooks, the authors were trying to insinuate that Canada's role in the war was minimal and token.
6. Lots of time spend on the Great Depression. Man, isn't capitalism evil!
7. A short mention of the causes of WW II.
8. And that's it! We won WW II, and nothing happened afterwards to this day!
And the sad part is, I feel I actually had, for the most part, relatively knowledgeable history teachers! It seemed as if it were mandated that certain areas of history (especially post WW II) not be covered for political reasons. I also noted that teachers of other subjects, such as economics, were horribly ignorant when it came to elements of history in their classes.
Just my opinion from my one personal experience.