(1) Each student's "grade point average" shall be the sum of the point values, as defined in WAC 392-415-050, of all the marks/grades received for all courses attempted, divided by the sum of the credits for all courses attempted.

(2) The grade point value shall be rounded by multiplying the numerical value of the mark/grade earned by the number of credits assigned to the course.

(3) Grade point averages shall be rounded to the third decimal place and reported for each trimester/semester or other term and for the cumulative credits earned for all courses attempted in high school.

(4) All marks/grades for all courses taken shall be included in the calculation of grade point averages except for:

(a) Nonnumerical marks/grades shall be excluded from the calculation of grade point averages; and

(b) Only the highest mark/grade earned for a class/course taken more than once to improve a mark/grade shall be included in the calculation of grade point averages.

This exception shall not apply to recurring courses. Recurring courses are not considered repeated courses taken for the purpose of improving a mark/grade. Recurring courses are those taken by a student to further develop their understanding and skills in the subject (e.g., journalism, advanced art or drama, concert band, etc.), or is taken by the student more than once to satisfy different credit requirements (e.g., advanced drama taken three times to meet an elective requirement, an art requirement, and the occupational education requirement).

(c) Credits attempted for courses taken more than once to improve a grade/mark may count only once toward the number of credits required for graduation.

(d) Credits attempted for courses taken more than once to improve a grade may count toward the number of credits required for graduation on the condition that the letter grades earned for all attempts are included in the calculation of the student's grade point average. Districts and schools shall not convert letter grades to nonnumerical grades/marks for the purpose of this subsection.