Which of the following is NOT a method used to teach drill?

The method identified as not being used to teach drill is group discussion. In the context of military drill training, effective teaching methods focus on structured approaches that emphasize precision, timing, and repetitive practice.

The "by the numbers" method breaks down movements into clear, sequential instructions that guide soldiers through the drill, allowing them to learn and execute steps accurately. The "talk through method" involves verbal instructions that help soldiers visualize their movements and understand the purpose of each action before physically performing them. The "step by step" method is similar, offering a gradual approach to mastering each component of a drill, ensuring that each individual can build upon their skills incrementally.

Group discussion, while useful in many teaching contexts, does not provide the structured, action-oriented approach necessary for drill training. It typically allows for open conversation, which may not effectively convey the precise commands and immediate learning required for executing military drills. This makes it less suitable in a setting where discipline, immediate application, and clarity are crucial.