Katherin followed along partly because she was curious. But mostly because she couldn't stand bullies. It didn't matter to Katherin that he was a teacher. As fair as Katherin was concerned he was a bully. Until she knew more about him Katherin planned to keep an eye on him. It was too late for her to go to class and she already had detention so might as well take advantage of the oppurtunity to learn more about the school and this teacher.