If your wife listens to the immigration agents, it's most likely she's been misled if not cheated by them. As for the excuse for the sake of child, the truth is that in Canada, the children won't get serious education till they go to university. That's why it's paradise for children here, plus, you as parents can't punish your children in any phisical means. For your case, immigration might be the last thing you want to consider.