This study aimed to develop a teaching material which is applicable in teaching descriptive text writing for tenth-grade students of Senior High School. Branch’s ADDIE model was used in the study in developing the instructional teaching material. Due to certain situation during the process of this study, the ADDIE model was only implemented for three phases only namely analyzing, designing, and developing (ADD). The purpose of designing the final product was to support teachers in teaching descriptive text writing. A need analysis was conducted in this research to gain information regarding the teacher and students’ needs. The designed product of the research was a web-based teaching material in form of a learning website. The developed web-based teaching material consisted of three chapters. It covers the descriptive text learning, grammatical aspect of descriptive text, and descriptive text writing lesson. There are activities on the lesson and a test for each chapter to measure students’ comprehension of related chapter. Furthermore, a validation made by the teacher displayed a percentage of 87% on the first questionnaire and 88% for the second. Both of the result can be labelled as “Very Good”. The result indicated that the designed product is suitable to be used in classroom to teach descriptive text writing for tenth-grade student of senior high school.Keyword: Developmental Research, Web-Based Learning Material, Descriptive Text Writing