Hey. For all you know, that "student driving teacher" could've been her dad or something? I'd imagine a number of other people wouldn't have told you to just keep going or that what it was wasn't a big deal. If they saw the girl and deliberately refrained from telling you (which a person teaching a student driver should be aware of the surroundings while driving because they're responsible for what happens) they had it out for her. She knows it was an accident for you and she's not interested in harming you. She may be unsure of who was teaching you (but it was really her dad). Mom makes her sit in the middle of the road, and dad is the driving instructor (who could've deliberately made you run into the little girl by distracting you).

Edit: just a...hypothesis if you will. Also, poor girl. Hope she's able to get some peace.