My kids took French Immersion social studies and never had an issue. But then history isn't everyone's cup of tea I guess. To me it was always the easiest subject.
Definitely not my cup of tea - I'm a science/math girl (my PhD is epidemiology) - but not notoriously difficult here. But, each province sets their own standards, so Quebec might well be different (have to check with my Quebec friends - we left Montreal well before I hit high school).



