(a) “Value added assessment” means:

(1) A statistical system for educational outcome assessment that uses measures of student learning to enable the estimation of teacher, school and school district statistical distributions; and

(2) The statistical system will use available and appropriate data as input to account for differences in prior student attainment, such that the impact that the teacher, school and school district have on the educational progress of students may be estimated on a student attainment constant basis. The impact that a teacher, school or school district has on the progress, or lack of progress, in educational advancement or learning of a student is referred to hereafter as the “effect” of the teacher, school, or school district on the educational progress of students.

(b) The statistical system shall have the capability of providing mixed model methodologies that provide for best linear unbiased prediction for the teacher, school and school district effects on the educational progress of students. It must have the capability of adequately providing these estimates for the traditional classroom of one (1) teacher teaching multiple subjects to the same group of students, as well as team taught groups of students or other teaching situations, as appropriate.

(c) The metrics chosen to measure student learning must be linear scales covering the total range of topics covered in the approved academic standards to minimize ceiling and floor effects. These metrics should have strong relationship to the core academic standards for the applicable grade level and subject.