Well you can give them stuff that they want but that always don't work,so u can be nice to them or ask them what is wrong with them hope this helps :))))))(
I would say something you could do to boost a child"s self-esteem when is comes to academics is to congratulate him or her when they have answered a problem in math or any other subjects by themselves. Minded you can't get them to overconfident that they will always do everything right, but keep it at a healthy medium reminding they to double check and keep trying until they get it right.
