It is difficult to teach many students how to write short essay at the same time. Generally guidance of a short essay has many the cases that one teacher teaches one student. But there is a method of short essay guidance effective simply because plural students learn it together. It is the "TAZAN NO ISHI" method that this report introduces. A person notices one's weak point by pointing out a weak point of another person. Because students contribute an opinion for each short essay which they wrote each other, as for this method, all the members improve a short essay making skill.