不知道以后怎么教育孩子?

Don't take any external reward too seriously. Try to improve kids' inner security first. If kids get the reward, thanks GOD for the blessing. If not, it is not a big deal, it is just a means to improve yourself, not the goal itself. I know it sounds odd. But if you don't focus all your attention and effort around external competition & rewards, concentrate on improve yourself instead, you may see I have a point here.

For this particular case, as a parent, I may challenge the result, at least get some explanation. I want my kids know I am in their sides.