What should a school bus driver do before turning?

Before making a turn, it is essential for a school bus driver to check mirrors and signal appropriately. This practice ensures that the driver is fully aware of the surrounding traffic and any potential hazards. Checking mirrors allows the driver to see vehicles or pedestrians in blind spots, ensuring that the path is clear before executing the turn.

Signaling appropriately communicates the driver's intentions to other road users, which is especially important in school zones where children may be present. This proactive approach enhances safety for everyone on the road, as it helps to alert other drivers and pedestrians to the upcoming maneuver.

The other choices would not promote safety. Honking the horn loudly may startle pedestrians or other drivers without providing necessary information about the driver’s intentions. Accelerating quickly could lead to loss of control or danger if another vehicle or pedestrian is in proximity. Only looking to the left neglects the requirement to check all directions to ensure a safe turning movement. Therefore, the comprehensive practice of checking mirrors and signaling is vital for safe driving, particularly for school bus drivers responsible for the safety of children.