The interactive class that used an active-learning with the minutes-papers is worked on. The minutes-papers are used on the lecture of river engineering at the sixth semester. There are written at the last ten minutes in this lecture by students. The progress report to catch the students’ understanding level, and the questions and the uncertainty from the student are described in these. Especially, the learning effect for the student can be improved by making questions of the examination in the MIT method. The following is clarified that both concentration for the lecture and consideration to study are improved with these minutes- papers.