humor
Humour: A good laugh now and again can motivate teenagers to want to come to class. Make up stories or ask them to help you solve a problem or to introduce a grammar point that they actually know. My favorite problem-solving activity used to be a story which was partially true. I would tell my students that I had received a horrible birthday present (an orange blouse for example) from my husband and I didn’t know what to do with it, without hurting his feelings. The students would come up with all sorts of solutions, have fun and, actually, practice their English.
This will give you and the students an opportunity to relax. They will be much happier about working when they notice the teacher is prepared to tell a story or joke. As a follow-up activity you can ask them to share similar problems they have or have had and their peers should suggest solutions. Teenagers will be eager to participate (as long as it is done in English) and our teaching objective will have been reached (2 nd Conditional: if I were you, I would…)