A teacher in my school has had an extremely difficult time with an unusually disruptive class. I was asked by the teacher to go into the class and intervene using TOC. The teacher is familiar with TOC as I had worked with him the previous school year. I worked with the class for four days. On days 1 and 2 we worked on the Cloud and two different NBR's. We also did Positive Branches to complement the NBR's. On the fourth day we used the PRT format with the Goal from the Cloud as our ambitious target. The class wrote the obstacles and the IO's themselves. On the day the teacher came back into the class and the students presented the work they had done. The students and the teacher discussed the Cloud, NBR's, Positive Branches, obstacles, and IO's. As a result of their discussion and using the PRT as a catalyst, they came up with a mutual "contract" for the class.