Bounce Drill with Letters Theory Things   William Wieland
Each letter followed by a comma is sung as a quarter note, all others are eighth notes. This exercise can be sung as a canon.

 F 
DD E DD EE D
 C,   C  C,   C  C,   C  C,   etc.

 C,   C B C,   C BB C,   C BB C,   etc.
 A  A G A