"The Big Parade" is a great first supplemental piece for students who are comfortable in C-major 5-finger position. They will explore various articulations, blocked intervals (2nds, 3rds, and 5ths). Another great feature of this piece is the LH melody in the B section. This is often neglected so that this is an excellent opportunity to work on this aspect of musicianship.
Students will also need to have a sense of a steady beat, as well as a wide range of dynamic contrast.
Biographical Information (Composer's website)