This PBL over emotions is an excellent way for your student(s) to consider their most dominant and leading emotions and to create strategies for coping with them when they are most intense. It is great for a unit over psychology or for social-emotional learning (specifically teaching emotional intelligence and self-awareness).
In the movie Inside Out, Riley has five leading emotions that control her throughout the day. Because of our unique personalities, our DNA, and the way we are raised, eve