It would be helpful to have the ability to lock/unlock gradebook access and ability to edit grades for teachers from prior quarters.  At the current time, teachers can go in and change gradebook grades from prior quarters, throughout the entire school year if they wanted to.  It would be best if schools had the option of letting teachers be able to do this or not.  This opens up the possibility of errors happening.  A view only option would be a nice option to have.