About group work
I understood pair work and group work are important.
I often did group work when I am a junior high school student. I think group work is very useful. Because there are not students who are boring. Everyone has something to do.
And for example, if there is very shy students, by group work, they may easy to say own opinions.
But by contraries, if students put together group members thoughts, there is possibility that teacher can't listen to minority opinions.
There are problems in group work.
By group work, student may be noisy. And they may not listen to teacher says. Teacher must say "Be quiet!".