Grading scales are different for Elementary (K-6th) and Middle School/High School (7th-12th) See below for details:
Elementary Grades K-6
O = Outstanding
P = Proficient
D = Developing
N = Needs Improvement
X = Not Applicable
Middle School/High School
0 - 59% = F
60 - 69% = D
70 - 79% = C
80 - 89% = B
90 - 100% = A