Why keep three different binders for everything?! Keep everything in one place so you never have to guess where you wrote this or where you put that!
Documentation Log can be used to documents parent communication, conferences, meetings, forms to to office, forms/letters sent home, etc.
Included is a sample of how I use the log in my own classroom. I put the log sheets in a binder, followed by tab dividers for each student in which I put copies of all paperwork.