Object hierarchy and basic operations.

The application manages:
(a) Classes.
(b) Lessons.
(c) Students.
(d) Weekly timetable.
(e) The courses assignments (eg Final Exams or Short Test).
(f) The personal assignments (eg Oral Examination)
(g) The courses comments.
(h) The personal comments for students.
(i) The student's absences.
(k) The student's scores on assignments.

The following diagram exhibits the relations between the above objects in Educational Difthera.

A novelty of this application is that the user has the option to attach images taken by device camera at students and scores of assignments. This gives at the teacher the opportunity to keep a copy of important documents that can not be registered otherwise in the application (such as a copy of a written test or the physical record of the student).

For all objects, the application provides a set of common operations that can be applied on them (Create, Modify, Delete) while there are some special operations for some of the above objects. The options of modification or deletion of an object may be provided after a long press on the object's layout, as is the case for a lesson layout as appears in Add Class Operation in MY CLASSES screen.

Long press transform the layout into a different one where modification and deletion button are presented. The user has 6 seconds to choose the desired operation.

Another way for these standard operations to appear is as special buttons when a secondary action bar is provided as is the case for the class page or the student's personal page.