Every year I post about this. I've posted pics of the stuff before, so I don't know if I will this year.
We use an Advent wreath, calendar, and a nativity. We use this book: Celebrate Jesus! At Christmas.
We also read a lot of books on St. Nicolas and on Dec 6th the children leave a shoe out.
On top of this, we'll continue regular school. We'll also have all the Advent activities at church as well as preparation for the girls who will be in the children's Christmas program.