Check out books from your school library that are themed with winter. Avoid stories that deal with Santa, as not every child is encouraged to believe in him. Select short picture books that generate a lot of laughs, such as "Thomas' Snowsuit" by Robert Munsch or "While The Bear Sleeps" by Caitlin Matthews.
Create a simple snowflake pattern on a folded up piece of paper that kids can cut out using safety scissors. Supply the class with materials to decorate each snowflake, and hang up the completed craft on a string across the room.
Supply kids with different sizes of white styrofoam balls. Teach the class how to glue the pieces together to make a snowman, and show them how to make a face on the top piece by using washable markers.
Make colorful poinsettias using paper that is colored with markers or crayons, then cut into strips. Assemble the paper into a pattern, and glue it to a paper plate.
Work on a jigsaw puzzle as a class. Give the children a puzzle piece that they are each responsible for finding a spot for. Glue the final puzzle together, and ask each child to write their name as best as they can on its backside.
Download and print coloring pictures of kids taking part in winter activities. Create a coloring contest with creative directions, such as only using shades of one color or coloring with their non-dominant hand. Award children prizes for their effort.