Team Building Task-The Cup Challenge - take a rubber band and tie 6 strings to it (though I think 5 would work if you want smaller groups). Participants must use only the strings to move 6 cups into a pyramid formation. You can make this a competition between the groups or give them harder cup moving tasks.
At the beginning of the year, make several New Student bags with welcome letters, name tags, birthday tags, etc. Anything that a new student will need. This will save a lot of time when you find out on a Friday that you are getting a new student Monday! eadavey