Check out this clip of a dad finding out his son raised his grade in Math from an F to a C.
The cynics out there will say the father over-reacted. Some will say the problem is he is putting too much emphasis on one grade. The point here is not whether the whole system of giving grades is effective or a worth while measurement of this boy's abilities.
The point is, as dads, there are times we need to push our kids to achieve more because we know they can do it. In these times when our kids make a change and progress in their maturity, we need to let them know that we are proud and we do not care how emotional we get when letting them know that. Kids love to please those who love and care about them so go ahead and let them know when you are proud of their efforts.