The 50% quantitative portion of the evaluation rating will be broken into 35% value-added data (or comparable data as approved by the Tennessee Department of Education) and 15% achievement data (as approved by the Tennessee State Board of Education). Decisions regarding this 50% will be determined by the teacher and principal by November 1 with exact calculations occurring later in the school year. TIGER is designed to equate the teacher’s final qualitative score into a five-point scale for the remaining 50%.