Here's the magic
Students learn the "Bat Colony" theme
The Bat Colony Theme is a primary musical idea that unifies the work. In the worksheets, all students can learn to play this music and its counterpoint idea which appears throughout the piece. This melody exposes students to parallel keys (Concert B♭ major and minor) and to phrase structure models which they can reference for their own creations.
Students create their own "Bat Themes"
I have created step-by-step worksheets to guide students and directors to compose their own 4-bar "Bat Themes." Students draw and describe their bat's personality and movement, then make musical choices within a framework to match their bat.
This activity can be done as a whole ensemble and in flex small groups. The sheets include:
The parallel major and minor scales (in transposed keys for each part)
3 Sample Bat melodies
Rhythm Skeletons: 1) pre-made 4-bar ideas, or 2) a rhythm bank for students to choose their own according to a pattern
Pitch Bank: Sample ideas of pitch shapes that students can apply to their rhythm
These individual bats can then be inserted in key places within the work, making each performance unique.