Secondary subject-grouped teaching resources
There are some pre-configured Sharepoint folders available to secondary schools, where staff can store and share teaching resources with students. Links to these resources can be added to your Teams groups. Instead of creating multiple copies of the same file and uploading it to each Teams group, create a link to the file hosted in the Sharepoint site. Files and subfolders in the 'Class Materials' folders are read-only by default for students.
There is also a 'Teachers Only' area within each of the subject areas - pretty self-explanatory, only teachers will have access to this area.