This research study seeks to conduct an objective investigation into the current curriculum applicable to written Arabic instruction and its overall design, to come up with improvements that positively impact students' writing skills. The primary inspiration for this study is the ideas of Adab and Humanities of UIN Sunan Gunung Djati Bandung, consisting of objectives, content, methods, media, and evaluation. To accomplish these objectives, this study has utilized the research and development method, which happens to be a procedure used for developing and validating educational products. This method is based on the steps of analysis developed and established by Borg and Gall. This research study has been conducted based on three fundamental theories: Intentional interactions, cognitive theory, and competency-based language teaching. The findings revealed that the current curriculum applicable to written Arabic instruction had several faults: an extremely rule-oriented teaching program, lack of creativity in the teaching materials, usage of only markers and white boards as media, and an unhealthy focus on results. The developed Arabic curriculum has been proven to possess increased merits: providing learners with ample training for the application of language rules, attractive teaching materials, usage of several teaching methods, placement and achievement tests, and multimedia.