IV. Methodology A. Research Design. This is quantitative research. Documentary analysis was used in conducting this mini research. B. Participant/Respondents. Grade 10 - Sardonyx Students at Nagrebcan National High School. C. Data Gathering. The data were gathered from the teacher's class record during the third quarter examination. D. Statistical Treatment: . Mean . Percentile: 1* Percentile - 5" Decile - 75th Percentile - 85th Percentile . Percentile Rank V. Presentation of Data and Data Analysis This will cover the presentation, analysis, and interpretation of the data that the researchers gathered through the class record. It includes graphical representation of the data gathered in tabular form. The data also shows the answer to the question stated in the statement of the problem.1. Background of the Study Math can be more represented to the future. Make ourselves smarter. Make our thinking analytical. Mathematics is the main problem of students in terms of their grade because we all know that Math subject is not easy for some students. But, some student love Mathematics as their subject. There are so many mathematical problems that are not easy to solve. In Grade 10 there are so many topic that we have like Intersection of events, Mutually Exclusive Events, Not Mutually Exclusive Events, Independent Events, Dependent Events, Quartile, Mendenhall, Deciles, Percentile and so many. At the primary, secondary, and tertiary levels, mathematics is an important subject. Its significance in the national curriculum cannot be overstated. All subjects, including language-based subjects, demonstrate the subject's utility. It is a fact that success in any type of training or work is largely dependent on the ability to grasp basic mathematical concepts. Hence, teachers must identify which students are having difficulty and intervene to assists them in overcoming these obstacles. The aim of this research is to analyse the performance of the grade 10 students in their third quarter examination specifically in Mathematics. II. Statement of the Problem This study aimed to help the researcher determine the academic performance of grade 10 - Sardonyx students in Mathematics at Nagrebcan National High School 1. What are the factors that affect the academic performance of the students in mathematics? 2. How does their academic performance in the third quarter examination affect their overall grade