Reward board music bulletin. Make a pin for each classroom and clip it to their designated grade. On your whiteboard or chalkboard put the word MUSIC ( I use magnets). During the lesson if the class is too talkative, take a letter away. If the class keeps all the letters on the board at the end of lesson, they move two steps on their keyboard. 1-4 letters left is one step. No letters = no steps. When a class reaches the end of their keyboard, they earn a free music class.
This was a fun activity to do in music class the first week of school involving the whole school! The kids spent just the last 10 minutes of class coloring there note/musical symbol. I also had a bit of a grade level assignment for them to include. The fifth graders wrote their favorite song title, the third graders wrote the value of the assigned note etc.