 Middle and high school students in Fairfax County will see some changes to how they're being graded in the new school year. WTOP's Acacia James takes a look at the new policy. The school system says it's introducing a D minus letter grade and shifting the grading scale slightly for grades D through F. The new model also puts an emphasis on comprehensive assessments like final projects or tests, and that will now make up 70% of a student's grade.