When I was a child in Ontario in the 1980s we had a single teacher for each class that taught all subjects except French, so (except for the French teacher) the

When I was a child in Ontario in the 1980s we had a single teacher for each class that taught all subjects except French, so (except for the French teacher) there weren't really any non-Math teachers. I imagine that things have changed a little, but probably not enough to except the preponderance of elementary teachers from being expected to be competent math teachers.