In order to earn their silver belt, students have to write and perform an original composition. In their recorder packets is a copy of this worksheet. Once they have completed their silver belt, I hang it on the "Featured Composers" wall outside my classroom.
I have found that by completing this one assignment a lot of musical concepts click a bit more for my students. They seem to be more aware of meter, not value, etc.
Something I found that I didn't like about this format was the worksheet itself. I think next year I will revamp it so that there is a brainstorming area where students can first create their rhythm before worrying about the melody.