Debsirinklongsibsam Pathumthani school is a secondary school in Lam Luk Ka, Pathumthani. I observed English teaching classes for fifteen days. However, I had opportunity to teach ten to twelve claases a week. I have learned that teenage students also love fun activities and games like elementary students do. Therefore, I have to combine my teaching style with hand-on activities. I believe that the more students involve, the more they learn.