抄録
Since 2016, this author has been studying how grammatical knowledge can be applied in classroom situations in a Japanese teacher training program. This paper reports on activities to improve skills of correcting and explaining the problems of learners' grammatical misuses. Students were provided example sentences containing grammatical errors and asked to correct and explain each problem intelligibly, assuming beginning level learners. Their performances were recorded and reviewed. As the training progressed, students recognized that they need grammatical knowledge as well as skills to deliver clear explanations, and their performance gradually improved.