There are several possibilities to count events.
Do not count additional periods and cancellations
Arist has three periods on a Wednesday according to his regular timetable. If he is on an excursion with a class for eight periods (see our example) then neither the three cancellations are counted negatively nor the additional five periods are counted positively.
It is required that the reason of absence for this event is "Excursion" (cancellations are not counted!). If another teacher is released because of the absence of the class then these periods are counted negatively for the respective teacher.

Count additional periods
If Arist's additional periods on Wednesday shall be counted positively then you must tick "Count" at the event in the event window.

Don't count releases
If the releases that result because of the absence of the class shall not be counted negatively then you must tick "Don't count releases" (column "Rel. no count") at the reason of absence.
