The author conducted a writing activity using an educational SNS, Edmodo. The learners of the class were asked to post a photo and a short passage on a specific topic before class, and these were then discussed in class. The interview data collected from the learners shows that the activity gave them an opportunity to acquire new vocabulary and to learn written expressions from the other learners' posts. The activity also induced the learners to be interested in what others were writing, and this greatly helped to create a 'supportive climate' in the class.
