Communicating with the teachers...

Hey all
I am working on putting together a new system for my girls to take to school. They all see several people throughout the day and I need a GOOD way for communicating with each teacher...since you dont have any time really to talk to them in the afternoons. I have an ok system, but want to improve it, thus searching for other's ideas. I would like all of your ideas for this, such as what sections you have for different teachers, do you use folders for each one or a 1" binder for all... Thanks so much!!