Hi there Meredith,
Here are some ideas for you:
Canada and It's Trading Partners is a unit study that has been ordered for our Overdrive Library in PDF format. This will really help you. Just check back in a day or two and it should be there.
In the L4U library we have the following:
Discovering Canada’s Trading Partners in the L4U library here:
And then for Child Labour there is:
Factory Girl in the L4U library by Barbara Greenwood - even though it is set in the Industrial Revolution - I think this really does put into perspective what it is like to be a child in a factory.
Days of Toils and Tears is another one in the L4U library that is again in the Industrial Revolution.
I hope that this gets you started, if you would like some websites to look at just email me at email@example.com and I will share some ideas for you...