Hii. I have started the marks section, however, I decided to set aside it to do another section which is more important: Subjects. The idea of this section is quite simple: the user can create a subject depending on his needs, and all his own personalize subjects will appear on the menus of the calendar, tasks and marks to create all those stuff. You can create infinite subjects and choose their color, which will appear too in the events and tasks. The next step is doing individual windows for each subject, so the user can enter into it by clicking on the subjects.