Since a very unfortunate constellation of circumstances won't allow us to watch a Christmas movie together (our last lessons together will be filled by your 'Schulaufgabe'), I'd like to give you two recommendations for some really good old shmaltzy Christmas movie feeling:
1. "Holiday Inn" with Bing Crosby and Fred Astaire (contains that most famous of American Christmas songs, "White Christmas").
2. "It's a Wonderful Life" (by Frank Capra, starring James Stewart and Donna Reed).
I'll give you a clip from nr. 1 - and the whole movie for nr. 2. Take your time, and get those paper tissues ready.