From "Miss Li never attends classes in the playground", we know that Miss Li is not a PE teacher, but a music teacher or an art teacher. From "Teacher Zhang needs to use the piano in class", we know that Teacher Zhang is a music teacher. Therefore, Mr. Wang can only be an art teacher, while Mr. Wang can only be a PE teacher. Miss Li is an art teacher; Teacher Zhang is a music teacher.

Miss Wang is a PE teacher. Miss Li is an art teacher; Teacher Zhang is a music teacher.