Answer: Advantages: Generally speaking, because collective teaching is an educational activity that teachers organize all children in the class purposefully and in a planned way, it can theoretically have the following advantages: (1) Efficient, economical and fair; (2) It has a strong leading role in children's learning and development; (3) strong systematicness; (4) The formation of learning community is of special significance to cultivate children's collective consciousness, organizational discipline and self-control.

Disadvantages: (1) Children have different interests and abilities, so it is difficult to teach students in accordance with their aptitude in group activities; (2) There is a lack of effective teacher-student interaction, insufficient "inspiration and guidance" and more than "indoctrination control" in the teaching process, and most children are in a passive learning state; (3) A single teaching method does not conform to children's learning characteristics and cannot effectively promote children's learning. @ Jin