It's never easy to find exactly what you want to use to teach horn students. It's even harder to find music to play for holidays and church. Here are some of my own solutions to those problems or things that have been shared with me. Forgive me if you think I've crossed the line with copyright issues.
You're welcome to use any of these arrangements. Just email me and tell me how the lesson or performance went.
This last file is the 14 Christmas carols from LDS hymn book as horn quartets. I've also transcribed them for every other wind and string instrument, so if you'd like to play ensembles with friends or family, email me and I'll send you the book for another instrument.