dwelsh, Thats good advise "don't let a jerk ruin your day". As a parent and grandparent, I wish my kids would have had a teacher like you. But I would like to know what advise do you offer the kid thats the "jerk"? I think your advise could be a little more productive by helping them to respect their fellow students.
As for wrestlingparent, Being proud is one thing, but I would suggest maybe they're bragging on their kid a bit TOO much. It sounds like he's a big talented athlete, and it could be they're giving him a big head.