Hi, Jiayu. I agree with you. Using some video conference software to achieve online teaching target is a very good way, especially in the current pandemic. Using these video software in class can really make people learn in different places. It can also realize many traditional classroom activities, such as group discussion. And as you said, the answers from the group discussion can show the learning outcomes. I think group discussion can also mobilize each group member into the classroom learning and mobilize thinking. This is also the reason why group discussion can be widely used.