Use Edmodo in the classroom---Make students help each other

On Feb, 15th I set up a group in Edmodo and asked SS to join the group

After reading the passage titled Save the trees, students in groups should  put forward at least one question and answered one of the questions their classmates have put forward

This activity made students try to think critically, and form the concept of sharing and realize the power of help. 

However, some groups in which all weak students were in failed to answer other groups' questions. This should be taking into consideration next time when doing group activity again. Maybe it may be better for a group to include different level of students.