Which method would be most effective in demonstrating respectful disagreement with a fellow student? a. interrupt the other student to force him to stop talking b. review the points on which you both agree c. change the subject to a more pleasant one d. agree to adopt the other student's point of view

That would be B. Review the points on which you both agree. You don't have the change your own opinion, interrupting them would be rude, and changing the subject just wouldn't be smart.

is basically a good source of getting and others by what you know for example if someone asked a question and you know the answer you could answer it and get some points or if you need on a question you could make a post about it and wait till someone answers it or just look up the question and see if someone else has asked about it