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Craig Greshaw, principal Creekside Middle School, Zeeland, MI -  "I personally have a site called "Three-for-Thursday" which encourages teacher to complete three "positive referrals" from the form above, which is embedded here. Then I give them three music videos for the day. Anyone who does three gets in the drawing to make a request of music for the next week."

https://sites.google.com/a/zps.org/three-for-thursday/