in chapter 15 , what did christy ask Ben to do ? explain her reason

At home, Christy confronts Mr. Ross about The Wave. She tells him that most of his coworkers frown upon the movement. She wants Mr. Ross to stop the Wave.  Mr. Ross insists that The Wave is teaching his students an important lesson, and if they stop now then his effort will be wasted. However, Christy remains concerned and informs him that Principal Owens wants to see him tomorrow morning.