This study was conducted to find out the effectiveness of my writing instruction and prepare for the following writing instruction in a graduate school context in the Southern part of South Korea. To achieve the goal, three research questions were raised and answered in a given order; 1) Participants of the study (N=20) show progress in writing in terms of accuracy and fluency, 2) The most frequently appearing errors appeared in the pretest were Title > Paragraph indentation > Mechanics > Balance > Agreement (Noun). 3) Meaning > Mechanics > Agreement (Noun) > Preposition > Article (a, an) errors survived at the end of the semester. Instructional intervention was quizzes and three assignments: 1) Building better sentences, 2) Collocation, 3) Capitalization, and 4) Participation at http://cafe.daum.net/etwas777. Based upon the findings of the study, instructional intervention, including writing, was suggested as the form of the quizzes in the future.