In todays modern world, educational trends also became varied depending on the school setting and learners situation due to the changing of learning modalities applied in each school. Learning is now focused not merely in a traditional spoon feeding of information to the students but rather give emphasis on the learners capabilities by gaining their own knowledge through their own experiences. The primary aim of the study was to determine Learning Method in Teaching Mathematics in enhancing the Learners Cognitive Ability. The primary respondents of this study were the Junior High School students of San Pedro Relocation Center National High School. One hundred ten (110) out of the total number of students in Grade 8 were used as respondents for this study. The respondents of the study were chosen using the simple random sampling. The descriptive method was used to determine Learning Method in teaching Mathematics in enhancing the Learners cognitive ability. The instrument used in the study was a survey questionnaire-checklist The questionnaire is a research-made instrument devised validated by the experts. Moreover, the statistical treatment used to compute and analyze the data were percentage, mean, standard deviation, Paired t-test and Pearson r correlation. The study shows that there is a significant difference in the cognitive ability of the students using learning method in teaching mathematics. Thus, the researcher, therefore, concludes that the research hypothesis stating there is no significant difference in the cognitive ability in mathematics before and after using Learning Method in Teaching Mathematics is rejected. And also, study shows the null hypothesis “There is no significant effect of Learning Method in Teaching Mathematics to the Cognitive Ability of the Leaners” is partially rejected. The study suggests and recommends that teachers may continue this method of teaching so that students will be motivated and increase their academic performance they will know the effects of the learning method in teaching Mathematics on the students cognitive ability. It also suggests that schools may develop curricula that will fit the students abilities and interests. They may also provide programs that will focus on self-gaining knowledge, self-evaluation, and self-discovery learning of the student.