I also have been searching for a sub binder idea; something simple that doesn't take to much to put together and I found one on TpT (it was FREE!).
from Persnickety Pickles. It didn't take much color. I will put it in a binder and put it on the shelf for the day I need a guest teacher. Once again, when I figure out how to link to her site, I will do so and let you know I did. It is not going to take too much time to put this together.