How much do you think children at school should learn of the negative aspects of their countries history?

Well under grade 3-4 not much, maybe that war happened and people died but no further detail.

After grade 4 then you can delve a little deeper, but most of what happened and why should be left til atleast grade 7-8.

Then in highschool (and on) you can delve into the negative aspects as much as the teachers want.

I couldn't have said it any better, I agree completely.

well history is history it never the present time for the main reason thing didn't work back then on a grand range.