ASP homework

In good group, students hear every opinion, nod to the others and express their idea.
The preside works well for every one to participate. That is, every one interacts.
In bad group. students looks lazy. Someone only states her idea and do not hear other opinions so that a girl can not say her idea. Another do not participate. That is, every one disintegrates.
To do good discussion, we have to time up minutes and stimulate our mind strongly. And privately, being apt to be shy, I have to be positive to participate discussion.