Take a group pic of students who have a birthday within the same month. Each child holds a number card representing their birthday. Great way to involve students and another chance to post their pic in the room!
Tree idea for Reading Area, tent... Options: attach some of the branches to the ceiling /or drape thin blue cloth for sky/night sky. Add white Christmas lights to the "sky" i.e. on the hanging fabric or wall ceiling.
If you teach elementary you MUST get this 'early finishers' board via TPT. It provides you with a FULL YEAR'S WORTH of printable activities to display. It is differentiated by learning style so students can pick and choose meaningful activities to do when they get done with their work. It revolutionized my classroom this year! She has various grade levels available!!