This study was conducted to find out the effectiveness of my writing instruction and prepare for the following writing instruction in a university 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 show no progress in writing in terms of accuracy and fluency, 2) The most frequently appearing errors appeared in the pretest were Meaning > Word choice > Usage > Agreement (tense) > Agreement (Noun numbers) , and 3) Agreement (Noun numbers) > Usage > Preposition > Meaning > Agreement (Subject and Verb) errors were survived at the end of the semester. Based upon the findings of the study, instructional intervention including writing was suggested as the form of the quizzes.