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Elf on the Shelf ideas I had heard about this little fella @ the holidays and bought one for my son and daughter-in-law. My grandchildren 2, 4 and 10 had so much fun with him. Every morning, the first thing they would do is race to find him and see what mischief he had gotten into while they slept.
Have students apply to be an elf. I would modify for upper elementary by having students write a persuasive proposal explaining why they are right for the job! Love the display.