I let the students make a cover page to personalize their notebook.
They then use the next four pages for the table of contents where they write the date, topic and what page that topic can be found on. After those four pages, the students start numbering their pages.
In the past, I used the notebook purely as a place to do classwork and homework problems and to take a few notes. This year I've tried to make it a little more interactive. The following are some foldables I found on-line.
This coordinate graph foldable by Kate can be found on her blog, To the Square Inch.
This order of operations foldable by Sarah Hagan can be found on her blog, Math = Love.
This integer foldable is another by Sarah Hagan and can be found here.
We write all our vocabulary in the notebook with the notes that we take.
The last five pages are used as an index for vocabulary words. The pages are folded into fourths and each column is assigned a letter. The students list the vocabulary word and the page that it can be found on.
I hope this motivates some of you to start using a notebook for math. If you already notebook, tell us some ideas that work for you. If you have an awesome foldable you'd like to tell us about, leave a link in the comments so we can check it out.
***ETA: I now have many INBs in my TpT store that you can check out HERE.***