Best Of

I just received a 1 star review. I asked the student to point out what was wrong in my quizzes and still no answer. This seems way to easy to just give a 1 star review when my other reviews are 3 stars+. Is there any way we can have those reviews taken down or at least have the student explain and if they can't to have the review deleted? It's obviously done in spite! I already got a 5 star review so why a 1????

I would like to create a community within my course so that the students and I can communicate with each other in forum like discussions. Is that possible?