Required lesson commentary for teachers
When entering attendance related to a lesson, you can force the lecturer to write a comment.
In fact, without this record, it will not be possible to go and define either absences or attendance.
To enable this function you will need to navigate to Configuration → Settings, select Teacher-related settings and flag "prompt the teacher for an attendance comment of a minimum number of characters."
All that will remain at this point is to define a minimum number of characters.