231.085  Duties of principals.--A district school board shall employ, through written contract, public school principals who shall supervise the operation and management of the schools and property as the board determines necessary. Each principal shall perform such duties as may be assigned by the superintendent pursuant to the rules of the school board. Such rules shall include, but not be limited to, rules relating to administrative responsibility, instructional leadership of the educational program of the school to which the principal is assigned, submission of personnel recommendations to the superintendent, administrative responsibility for records and reports, administration of corporal punishment, and student suspension. Each principal shall provide leadership in the development or revision and implementation of a school improvement plan pursuant to s. 230.23(16).