This research aimed to improve written expression (composition) skills of 5th grade students of an elite private school. The research was designed under the paradigm of action research. A total sample of 39 students' from the same grade was chosen for the study. The baseline assessment was carried out to explore the pre-intervention writing skill score of the students prior to the intervention cycle one. Later, intervention and writing skill support strategies were carried out for eight weeks. In the end, post-test was carried out to explore the differences occurred in the writing score of the students as a post intervention effect. The findings obtained from the quantitative data showed the improvement in the written expression skills of the students. It was observed that through taking the above mentioned measures, the teachers can help students improve their writing skills.