This study analyzed the factors affecting the NAT performance of schools in Araling Panlipunan of Grade 10 students and Araling Panlipunan teachers in eight selected Public Secondary Schools in the Division of Lipa City. The researcher wanted to know the factors that may affect the National Achievement Test performance of the respondents in terms of student-related factors such as study habits, interest in the subject and technology and teacher-related factors such as personality traits, teaching skills and instructional materials. It is an attempt to find out if there are significant relationship between the factors and the NAT performance of the respondents. The study adopted a descriptive method of research design. Quantitative approach of data collection was employed. A total of 358 respondents constituted the sample of the study. These included 16 teachers in Araling Panlipunan and 342 students from the eight selected schools in the Division of Lipa City. The researcher used the validated survey questionnaire consists of students’ interest in Araling Panlipunan, their study habits and their attitude towards the use of technology. Another set of survey questionnaires consists of teachers’ attitude towards personality traits, teaching skills and instructional materials. Through survey questionnaire, the study dealt with the relationship of the student-related and teacher-related factors to the NAT performance of schools in the Division of Lipa City. It involves selected students and teachers of Rizal National High School, Bolbok National High School, Lodlod National High School, Fernando Airbase National High School, Pinagtongulan National High School, Anilao National High School, Lipa City National High School, and Lipa Science National High School respectively. Study habits, interest in the subject and teaching skills are said to have a direct relationship to the NAT performance of schools in Araling Panlipunan. It means that the more a value of independent variables increase, the more it is likely to cause favorable results. Meanwhile, other related factors do not affect the NAT performance of schools in Araling Panlipunan. Based on the summary of the findings, the participants’ schools did not perform well in the 2012-2015 National Achievement Test (NAT). Most of them are placed in the bottom half of the rankings and did not meet the passing rate of 75%.