What should you immediately do after stopping the bus?

After stopping the bus, the appropriate action is to open the entrance door slightly. This procedure is crucial for several reasons. First, it ensures that the bus driver can easily communicate with passengers, especially if they are boarding or disembarking. By opening the door, the driver indicates that it is safe for students to enter or exit the bus.

Additionally, by keeping the door slightly ajar, the driver maintains awareness of the surroundings, allowing them to monitor for any potential dangers, such as approaching traffic or pedestrians. This action can also help maintain ventilation within the bus, which can be especially important in varying weather conditions.

The other options serve different purposes at other times but do not directly relate to the immediate actions required after stopping the bus. For example, closing all windows and conducting a headcount are necessary actions but typically follow the initial opening of the door when addressing passenger safety. Activating the hazards is essential while the bus is stationary in certain conditions, but again, it is secondary to ensuring that the entrance is open for passenger safety.