Other ways to handle it?

[umpharp]

Thanks for the comments. We did have a good conversation after the game and it did seems like he was willing to learn.
I do think that I gave too much leash to the coach and scorekeeper, but we all learn.
I also agree with Mike that even though procedure would usually call for me to send him to my partner since it was his call that in this case I should have stepped in and do what Andy suggested with making it a three way conversation.
This was a good learning tool for both of us, especially the rookie. I think that him seeing a coach get upset and arguing opened his eyes to the fact that there will be games where there are arguments.
I hope he comes back for another year.