rewards are given for good behavior, not prizes. prizes are for competition
Por buena conducta is the correct. Para would be if it's given not as a reward, but as encouragement....
What is wrong with "award."
You are as wise as Solomon. Reward and award are pretty darn close. Craig.zar could probably elaborate on their subtleties.
I would say award is when the prize you gain is mostly the honor of having received it. If it is mostly something material (such as money) it is a reward.
How about prize and award?
Rewards and awards are both prizes. Prize is a more general term.
We're being trained to babysit in Spanish speaking countries...