How did old human teachers correct children?

Correct answer: By explaining and giving practice

The governing concept is guided learning. In an old human-teacher classroom, correction was usually connected with explanation, feedback, and repeated practice. If a child made a mistake, the teacher could identify the difficulty, explain the rule or method again, and give suitable exercises so that the child could improve. Thus, option A is correct because it describes a constructive process rather than merely pointing out an error. Sending children out does not teach them how to improve. Switching off a machine is unrelated to the role of a human teacher, and erasing questions removes the learning opportunity. The answer also supports the story’s contrast between personal teaching and mechanical instruction.