Possible Clues:

• Reading out of a list of names to check attendance
• It could reveal that you're not all there
• Reading out of list of names to check attendance
• Part, reportedly, caught by everyone in list of attendees?
• Teacher's attendance check
• Check-up presently made?
• Opportunity to tick off the assembled company
• Start of many classes
• Process of establishing the present list?
• Reading of list of names to establish attendance