Take a mason jar and spray the lid with chalkboard paint. LOVE this idea.
Each time a student BLURTS out loud without raising hand they have to take one down. Last person to have all 3 gets rewarded!--I've seen this implemented in a first grade classroom with a lot of success!
DIY mason jar chandelier
DIY mason jar lights. TOO EASY!!!!!!
Easy DIY mason jar decorations
20 Easy and Unique DIY Holiday Gifts You Can Make With Mason Jars