ABSTRACT Isna Ningtyas Soduwuh. K2211047. ENHANCING STUDENTS’ WRITINGSKILL THROUGH INTERACTIVE WRITING (A Classroom Action Researchat the Tenth Grade of SMA Batik 2 Surakarta in the Academic Year 2014/ 2015).The first consultant: Drs. Muhammad Asrori, M.Pd. The second consultant: HefySulistyawaty, S.S., M.Pd. Thesis: English Education Department, Sebelas MaretUniversity. 2015. This research was aimed to (1) investigate whether and to what extentinteractive writing enhance the students’ writing skill (2) describe the classroomsituation during the implementation of interactive writing in writing class. Theresearch was conducted at SMA Batik 2 Surakarta from January to August 2015.The method of the research was Classroom Action Research. The subject of theresearch was the tenth grade students of SMA Batik 2 Surakarta in the academicyear 2014/ 2015 which consisted of 33 students. The research was organized intwo cycles. Each cycle comprised planning, acting, observing and reflecting. Thequalitative data were gained through observation, survey, and interview. While,the quantitative data were gained by assessing the students in the form of test. Some findings were obtained from this research. First, implementinginteractive writing was able to improve students’ writing skill. It could be seenfrom the students mean score which increased from 64.18 to 72.45 in cycle 1 and79.70 in cycle 2. Besides, the improvement of students writing skill covered theimprovement of all aspects of writing covering content, organization, vocabulary,grammar, and mechanic. Second, implementing interactive writing in the writingclass brought better changes dealing with the classroom situation. It promoted theclassroom interaction as the interaction between the students to students as well asthe students to the teacher. Furthermore, there were teacher’s supports duringinteractive writing. Besides, it promoted the students to be more active sinceinteractive writing was student-centered. The students were engaged more duringwriting class. Last, the writing class was more enjoyable that affected to thestudents’ motivation during writing class.