Some ideas for Christmas celebration at school:

http://audio-class.ru/mailing/english/2010.html

http://www.bbc.co.uk/newsround/15772491

http://www.teachingideas.co.uk/themes/christmas/index.htm

http://www.kidspot.com.au/slideshow/Christmas-cards+126.htm

http://myweb.tiscali.co.uk/dovecot/Pages/ChristmasIdeas.htm
http://childparenting.about.com/od/funcelebrations/tp/PlankidsChristmasparty

http://resources.woodlands-junior.kent.sch.uk/teacher/christmas.html#world

http://learnenglishkids.britishcouncil.org/en/category/topics/christmas