Google is opening up family group sharing for Photos, Calendars, and Keep
Not quite useful for school settings, but if you use personal Google accounts, then the family updates will make sharing easier.
I can’t wait to try this out with the shared calendar. Right now we have separate calendars for each family member, that’s shared with each person. Which you would think would work swell, and it does. Except for notifications. Some events will have two or three notifications!