2. develop and improve their spoken language and imagination. teaching important and difficult points: to express their opinions freely teaching methods: discussion in groups and task-based activities teaching procedures: step 1 lead-in 1.show pictures of growing pains and lead in: pictures about what often happens in the growth of teenagers 2.play a short video clip to arouse the students’ echo to growing pains and activate their interest. step 2 discussion give students three questions related to the video clip to organize them to discuss the subtopics to further main topic.(ask several students to give a feedback)