CFI Note Taking

Hey everyone. Just wondering what everyone uses to take notes in flight. I have a couple proficiency checklists in OneNote that I use with checkboxes, but that's more for making sure I cover everything per the FAR and ACS. I'm trying to think of something for taking more detailed notes about a student's progress, strengths, weaknesses, other techniques/explanations to try, etc.
I've tried a few things like writing in the scratchpad on ForeFlight, but it gets difficult when things get bumpy. Typing also seems a little less than ideal.