my school has 4 marking periods. you receive a grade for each mp.
there are 2 semesters. some classes are for both semesters (all 4 mp's). some classes are only half a year (just 2 mp's).
the final grade for the class is the average of all four (or in some cases, two) marking periods (plus the midterms and finals)
what the hell do i put: two grading periods per year, one grading period per year, or three grading periods per year? o_O