This study examined the student’s practices in using self-learning module in improving the learning competencies of students in Filipino in terms of writing and reading. The topic is relevant in today’s school environments as the learners is more diverse than before, and it is important that school administrators take the subject into consideration as effects of self-learning module in the learning competencies of students in Filipino. This study used descriptive statistical method. It was conducted among 210 students in Grade 9 of Castillejos District, Castillejos, Zambales. The researcher developed and administered a survey using self-learning module and 30-item test in the most essential learning competencies in terms of reading and writing The results reveal that majority of the students (50.47% or 106 out of 210) in writing and (41.43% or 87 out of 210) in reading indicates that the Grade 9 students are in the Average level of learning competency in Filipino. It shows that students’ practices such as using internet, other people involved, and longer time spent in using self-learning modules have a significant relationship in improving the learning competencies of the students in terms of reading and writing. These practices were found to positively correlate with the improvement of specific learning competencies in Filipino. In the light of the findings of the study, the researcher recommends designing training programs for teachers and learners to effectively enhance self- learning module. The researcher also suggests conducting further studies in the same field in different levels.