Difficulty

Green Circle: Accessible to ensembles with less-skilled performers.
Blue Square: Intermediate—some higher-level demands that should still be realized by most performers for the music to work.
Black Diamond: Advanced—higher-level demands must be consistently realized by nearly all performers for the music to work.

HS-Recommended: Includes green circles and blue squares that probably would be both worthwhile and achievable for a high school drumline.