As mentioned elsewhere in this thread, teachers in Ontario (and most places, I imagine) do not specialize in a subject until high school or so. So most teachers

As mentioned elsewhere in this thread, teachers in Ontario (and most places, I imagine) do not specialize in a subject until high school or so. So most teachers needs to be able to teach every subject. This is besides the point though, in my opinion. Any teacher being unable to do basic arithmetic is extremely alarming. It calls into question their entire credentials as a teacher. Anyone who graduated high school, let alone college should be able to do arithmetic. This isn't a case of teacher in subject X has some knowledge gaps about subject Y. This is a case of a teacher missing basic adult competencies.