Beyond the two student assistants assigned to each emergency exit, the AAMVA CDL Manual recommends assigning another student assistant to do what?

AAMVA CDL Manual, Section 10.3.2 – Evacuation Procedures (Be Prepared and Plan Ahead), p. 10-6

Getting students off the bus is only half the job — they still need to get to an actual safe location away from traffic, fire, or other hazards. Assigning someone to lead that final step in advance prevents confused students from wandering toward danger after they evacuate.