Old-school children studied the same lesson together, showing which ability of human teachers?

Correct answer: Turning one lesson into collective discussion

The governing concept is the social and interactive value of human teaching. A human teacher can present one common lesson, invite different learners to respond, compare their ideas, clarify misunderstandings, and guide the class towards meaningful discussion. Therefore, the same lesson becomes a shared learning experience rather than an isolated task completed by each child alone. Option B is correct because it directly expresses collective discussion. Option A suggests neglect, option C is exclusion rather than education, and option D describes imitation of a machine, not a special human ability. The question therefore tests how teachers combine instruction with communication and group learning.