A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Are you using Office 365 Education?
Are you sharing the files in OneDrive or SharePoint?
OneDrive in Office Education is different than OneDrive in "consumer". Has different options.
Take a look at these Office Education teacher resources. One is a forum similar to this one for teachers in Office 365 Education. People there have more specific hands on experience and can probably provide better answers.
MS Educator Center - Teacher
https://education.microsoft.com/en-us
Lots of links, including these few examples.
Sign up for their newsletter.
Somewhere in there is a forum for teachers to ask for help from other teachers