In the first book he berkata its his first tahun at middle school,so he was 6th grader that time,but Rodrick Rules takes place the selanjutnya tahun after the first one,he is in 7th grade till Ugly Truth,he is in his last tahun of 7th Grade in The Third Wheel,he might also be in 8th grade,but there are children at his middle school which are a tahun elder then him so he must be 7th Grader.