Miss. Code Ann. § 37-11-64

(1) No school board member, school superintendent, assistant superintendent, principal, guidance counselor, other teachers, coaches, or other administrative staff members of the school or the central staff of a local school board shall attempt, directly or indirectly, to change, alter, or otherwise affect the grade received by a student from his teacher except as otherwise specifically allowed by this section.

(2)(a) A teacher's determination of a student's grade as a measure of the academic achievement or proficiency of the student shall not be altered or changed in any manner by any school official or employee other than the teacher except as provided in this subsection.

(b) A school official or employee having authority provided under formally adopted written rules and procedures adopted by the local school board to change a student's grade can take such action only upon it being determined that the grade is an error or that the grade is demonstrably inconsistent with the teacher's grading policy.

(3) Any local school district or personnel employed by the school district who violates the provisions of this section shall cause the local school district or school to be subject to losing its accreditation in the manner determined by the policies and procedures of the State Board of Education.