This study utilized the six primary traits of evaluation factors of an argumentative writing (content,
organization, voice, sentence fluence, word choice, convention) to compare the traits of argumentative
writing development in twoGrade 3 students (higher and lower standards). For such, the origin and factors
of the six primary traits of evaluation factors of an argumentative were examined. Then, the essays of the
two students were analyzed and compared. As a result,the following facts were identified. First, the
student with higher standard proposes two supporting sentences for each statement,however, the student
with lower standard proposes one supporting sentence for each statement. Second, the writing of the
student with higher standard has solid organization with abundant vocabulary, however, the writing of the
studentwith lower standard both has poor organization and vocabulary. Third, the writing of the student
with higher standard has complex sentence structure and demonstrated various lengths while the writing
of the student with lower standard has simple sentence structures and was shorter. Fourth, the student
with higher standard used correct grammar and sentence symbols most of the time but the student with
lower standard lacked in such areas.