User does not have access to Add/Update/Delete on various Pages, even though their Permissions show they should
Environment
User type Records: User
- This does not apply to Teacher or Admin Accounts
Cause
The User's School Access Permissions are set to Read Only. That Read Only option will override any Insert, Update, Delete, or Mass Update permissions given to the user via a Group or individual Permissions.

Resolution
Remove the checkmark in the Read Only box for the schools where the user needs Add/Update/Delete permissions.