New Jersey Statutes Title 18A. Education 18A § 4-24

The commissioner shall pursuant to rules and regulations of the State board, inquire into and ascertain the thoroughness and efficiency of operation of any of the schools of the public school system of the State and of any grades therein by such means as to him seem proper, and he shall report to the State board the results of such inquiries and such other information with regard thereto as the State board may require or as he shall deem proper, but nothing in this section shall affect the right of each district to prescribe its own rules for promotion.