This look up is key to the smooth running of SchoolBase it records the possible types that a student may be recorded as. Amendments to this table should only be carried out by a super-user and then only after careful consideration. The columns titled Pupil Timetable, Staff Timetable and Room Timetable are used to select non standard templates for timetables. The report Title column can be used with academic reports. The Period Time Set column links a period set to a part of the school and is used with real-time timetables, and the Centre No column is used to hold the centre number for external examinations.