1003.437  High school grading system.--The grading system and interpretation of letter grades used in public high schools shall be as follows:

(1)  Grade "A" equals 90 percent through 100 percent, has a grade point average value of 4, and is defined as "outstanding progress."

(2)  Grade "B" equals 80 percent through 89 percent, has a grade point average value of 3, and is defined as "above average progress."

(3)  Grade "C" equals 70 percent through 79 percent, has a grade point average value of 2, and is defined as "average progress."

(4)  Grade "D" equals 60 percent through 69 percent, has a grade point average value of 1, and is defined as "lowest acceptable progress."

(5)  Grade "F" equals zero percent through 59 percent, has a grade point average value of zero, and is defined as "failure."

(6)  Grade "I" equals zero percent, has a grade point average value of zero, and is defined as "incomplete."

For the purposes of class ranking, district school boards may exercise a weighted grading system.