What technique is taught to clear the majority of a room without entering it?

Threshold Evaluation is a technique that allows responders to assess the situation in a room from its entrance without having to physically enter. This is crucial in active shooter scenarios where safety is paramount, as it enables individuals to gather critical information about the room, such as potential threats, the layout, and any victims present, all while minimizing exposure to danger.

When utilizing Threshold Evaluation, responders can employ various strategies like peering into the room, using mirrors, or other tools to gain visual information. This method emphasizes the importance of quick assessment to determine the best course of action, whether to assist victims or engage a threat.

This technique is particularly effective because it acknowledges the risks involved in entering a potentially dangerous situation, allowing responders to make informed decisions based on the gathered intelligence without compromising their safety.