A method of adding a co-teacher to an original teacher's class notebook can include, in response to receiving a request, at a client device, to add a co-teacher to a class notebook managed by a classroom notebook application, assigning the co-teacher full read/write permissions to the teacher's class notebook including any section groups having connected role inheritances. The co-teacher is also assigned full read/write permissions to the student-specific section groups and the collaboration space section group, which are all in the class notebook and which have broken permission inheritance. To protect the teacher's personal folder, which is a parent folder to the teacher's class notebook, the classroom notebook application removes the co-teacher's permissions to the teacher's personal folder.