mClass has 2 permission levels: Standard and Full.
These permission levels are granted in the Amplify Admin Portal > Users > Organizations > Role field.
Teacher role = mClass Standard user
Administrator role = mClass Full user
The article below provides more information. Specifically, it states that if you manually set this role value that a sync (such as Clever or Classlink) will NOT overwrite your setting.
https://my.amplify.com/help/en/articles/6236725-admin-portal-permissions