grad·er 
/ˈgreɪdɚ/ noun
plural grad·ers /ˈgreɪdɚ/ noun [count] 1 US : a student in a particular grade in school
▪ a sixth grader [=a student in the sixth grade] 2 : a person who grades students or their work
▪ Her students say that she's a tough/easy grader. 3 : a machine used for grading a surface
▪ a road grader
▪ a sixth grader [=a student in the sixth grade]
▪ Her students say that she's a tough/easy grader.
▪ a road grader
