In case you haven't noticed, I went ahead and added science to the Notebooking series. (I also use notebooks for science so I thought I would give tips for those too.)
When introducing and setting up the notebooks, I always go over and have students sign a list of guidelines. (You can check it out below, two for science and one for math.) The students then glue them to the inside cover of the notebook.
I hope you find these useful!
Math Journal Guidelines
Safety Sense Contract
Science Journal Guidelines