Too many issues and problems in school lie in the fact that no one wrote it down.
A promise made and not met can be troublesome if no one wrote down the promise in the first place.
Conversations, decisions, and facts can be forgotten if no one keeps notes.
Conjecture confounds good decisions, process, and collaboration, while accurate notes, data charts, letters, emails, and other written communication support collective effort and result.
So, get that in writing, whenever you can as one way to foster good work and positive collaboration.