School attendance: The attendance in an establishment of the system of formal (publicly or privately recognized) education is considered school attendance (attends or attended).

Attendance in private academies, institutes or centers for studies that do not pertain to formal levels are excluded. For example: foreign languages, musical instruments, preparatory courses, for training, and technical courses done in these institutions (hairdressers, computer science, etc.). Also attendance in post graduate courses is excluded. If an enumerated person is doing post graduate work, it is considered that they "Do not attend but attended" at the university level.