The purpose of this descriptive quantitative study was to address the letter writing skills among high school students. The study participants were 20 eleventh-grade students from Semong National High School. The study introduced an intervention called Write – Right Program (WRP) to improve the letter writing skills of the students. The pre-test and post-test results showed a significant difference: the pre-test had a mean score of 8.03 (SD = 2.09), while the post-test showed a mean score of 13.95 (SD = 4.01). The statistical analysis revealed a highly significant improvement in the letter writing skills of the students following the intervention, t (19) = 12.5, P < .001. To provide a comprehensive understanding of the students' insights during and after the intervention, the researchers conducted interviews with selected individuals. From the responses gathered, four themes emerged regarding the insights of students: enhanced understanding of writing conventions, noticeable clarity in written expression, improved confidence in writing, feedback-based and peer-supported learning