What Are some quotes that show how Mr. Ross's personality changed

Mr. Ross changes twice in the story. He changes when he lets his social experiment get out of control and then he changes again when he tries to end the experiment.

I realize now that I made a mistake. A history class is not a science lab. You can’t experiment with human beings. Especially high school students who aren’t aware that they’re part of an experiment.” Ben Ross, Page 122

Here, Mr. Ross explains the lesson he has learned from The Wave to Principal Owens. Although he believes the students will take to heart The Wave's lesson about fascism, Mr. Ross understands that it went too far and he did not exert enough control over his experiment. He admits that his project has had repercussions on other people, something that his ego prevented him from recognizing before.