One possible version：

In many schools the students take their seats according to the scores in the examination.That is,the student who take the first place in the exam can have the right to take any seat if he or she likes.

I don’t think it is right. There are several reasons for this. First of all, it is unfair  for the students with lower scores. It will hurt these students’ feeling and as a result they will lose their hearts.Secondly,for the students who get a better seat, they will think wrongly that they can get whatever they want if they study well.What ‘s worse, they will think that studying well means everything so that they ignore the character training,which will do damage to his future life.

In conclusion,it is high time that we took measures to stop it.