The objective of this research is to find out whether Think-Talk-Write (TTW) strategy develop students' writing skill in narrative text. To achieve the objectives, this research employed a quantitative experimental method using one group pre-test and post-test design. The population of this research was the ninth grade students of SMPN 1 Bulango Timur, consisting of 29 students. Data were collected through writing tests on narrative texts before and after treatment. The results show that the TTW strategy gave a positive effect on students' writing skill. The mean score of the pre-test was 23.65, while the mean score of the post-test increased to 39.03. The statistical analysis used Wilcoxon Signed-Rank Test because the post-test data were not normally distributed. The result of the test showed a significance value of p <0.001 and an effect size of -1.000, indicating a strong and significant improvement in students writing ability after the treatment. The increase in scores proves that Thunk-Talk-Write strategy effectively enhances students' understanding and ability in writing narrative texts. From the data above, it can be concluded that the use of Think-Talk-Write(TTW) strategy is effective m developing the students writing skills in narrative texts. It provides structured stages that encourage students to think critically, collaborate through discussion, and express ideas in written form. Keyword: Writing Englsh, Narrative Test. Think-Talk Write strategy