In working with students this year I have been working on creating a notebook reference guide. We are using a 3 ring binder so we can add pages as we need.
I highly recommend “Interactive 6th Math Notebook” created by Nerdy Numbers, and sold at Teachers Pay Teachers. They have a variety of levels, this is just the one I was using. I am using many of these pages in class, but sometimes they did not have a page for a topic I was teaching or I wanted to present a topic a little differently.