After all students have left the bus during an evacuation, what should the driver do before leaving the immediate area?

AAMVA CDL Manual, Section 10.3.2 (Evacuation Procedures – General Procedures), p. 10-7

A panicked or injured student can be left behind unnoticed in the chaos of an evacuation. The mandatory walk-through closes that gap by confirming the bus is actually empty before the driver considers the evacuation complete.