Decor for day:Elsa Papercraft
Math: Check out some of these free math resources: https://www.teacherspayteachers.com/Browse/Search:frozen%20math/Price-Range/Free
Writing: What would you make out of snow? A friend for Olaf? Something else?
Reading: Learn about foreshadowing: Foreshadowing in Frozen by I Teach Like a Boss | TpT
History/Geography: The Story Behind the Story of Frozen | Disney Insider