Don't use paper at all (too much work, takes too much time). Since I started using Finale, I make everything there. When I want to create something new, I almost always take the theme/motif/idea from the piano. These are in fact my main compositional tools: piano and computer.
Thanks for the submissions so far!
Hint to all: HS students enjoy a story with music, something that appeals to them. I am going to let them have the final vote. Making sure it is fun to play is a big deal. This doesn't mean it has to be cheesy or fast for them to enjoy it but be careful not to be too "sophisticated"