YOU SAID:
私の学年は8位です
INTO JAPANESE
私の学年は8位です
BACK INTO ENGLISH
my grade is 8th
INTO JAPANESE
私の学年は8年生です
BACK INTO ENGLISH
my grade is 8th grade
INTO JAPANESE
私の学年は8年生です
BACK INTO ENGLISH
my grade is 8th grade
That didn't even make that much sense in English.