Merry Christmas!
To begin let's learn the vocab of xmas with these flashcards: 1 and 2
Then, let's have a look at this simple video about Christmas and customs on the British Council site: "My favorite day":and don't forget the activities that go with the video!: 1 and 2
And, finally, why not learn this song? :"Santa, Santa, High in the sky"
with its lyrics, games and activities.