Here are links to Christmas-related activities:
A4 ESL Christmas holiday page (this is an old page so some links no longer work, but most do)
Christmas Around the World- (Kaboose)
Christmas Traditions- A UK site featuring all things Christmas
Colonial Christmas- How Christmas was celebrated in Colonial Williamsburg
www.northpole.com - A Santa-focused site
Visions of Christmas - a history of Christmas site (advanced)
Boggle's World- printable worksheets
