In Brief: 
Students learn how interrelated notes and clefs are by moving the clefs (treble, bass, alto and tenor) up or down. Music Mind Games materials make it simple to understand.
Articulate the shape of the C clef, how the C clef relates to middle C and the grand staff, how to place the clefs on the staff, how clefs are moveable and a way to tell the difference between the alto and tenor clefs.
Teacher's Role: 
Demonstrate the game and play along setting a good example for students
Usually played once but may be repeated