Local school administrative units shall evaluate all principals and assistant principals at least once each year. Either the superintendent or the superintendent's designee shall conduct the evaluations. The State Board of Education shall ensure that the Standard and criteria for the evaluations include the accountability measures of teacher retention, teacher support, and school climate. The State Board shall revise its evaluation instruments to include these measures. A local board shall use the performance Standard and criteria adopted by the State Board unless the board develops an alternative evaluation that is properly validated and that includes Standard and criteria similar to those adopted by the State Board.