N.J. Stat. § 18A:27-3.1
Every board of education in this State shall cause each nontenure teaching staff member employed by it to be observed and evaluated in the performance of her or his duties at least three times during each school year but not less than once during each semester. Said evaluations are to take place before April 30 each year. The evaluations may cover that period between April 30 of one year and April 30 of the succeeding year excepting in the case of the first year of employment where the three evaluations must have been completed prior to April 30. The number of required observations and evaluations may be reduced proportionately when an individual teaching staff member's term of service is less than one academic year. Each evaluation shall be followed by a conference between that teaching staff member and his or her superior or superiors. The purpose of this procedure is to recommend as to reemployment, identify any deficiencies, extend assistance for their correction and improve professional competence.
N.J.S. § 18A:27-3.1