In the movie LEAN ON ME why does Joe Clark accept the job?

In the movie "Lean on Me," Joe Clark accepts the job as principal of Eastside High School because he is deeply committed to improving the education and lives of the students in a troubled school environment. He believes that strong leadership and discipline are essential to turning the school around and instilling a sense of pride and responsibility among the students. His personal experiences and passion for education drive him to take on the challenging role, despite the resistance he faces from the community and school board.