This study aims to determine the Factors Affecting Performance in General Mathematics of Grade Eleven students in Talumpok Integrated School: Basis for Intervention Activities to improve academic performance in the subject. This action research covered the analysis of data gathered through a research-made questionnaire focusing on factors affecting student performance in General Mathematics like student-related factors such as; interest and study habits, and teacher-related factors such as; personality traits, teaching skills, and instructional materials used by the teacher. The respondents of the study are Grade Eleven STEM and ICT students with the total of 28 participants, 19 are females and 9 are males. Majority of the respondents are 17 years old which is 67.86 percent of the total sample size, males which is also 67.86 percent, and 71.43 percent of the respondents are from ICT strand. The factors that affect student performance are study habit and interest which are both under studentrelated factors. Propose action is supplementary activities since respondents showed low interest in the subject. Supplementary activities that will practice good study habits such as games and other related activities that will boost student interest in the subject. In addition, the lack of workbook/textbooks as instructional materials highly affects the academic performance of the respondents. The research did not include parents, and even the other subject teachers, the guidance counselor, as well as the principal of the school, as respondents. The study did not cover the other factors affecting student performance outside the school. The research is limited to the honest responses of the respondents to the items of the questionnaire. The result of the action research concerning on the factors affecting student performance in General Mathematics will highly contribute in determining the best action that could be done to improve the academic performance in General Mathematics subject in grade eleven. Moreover, the result of this research will be useful for the subject teacher in formulating intervention activities and other supplementary materials improve student performance in mathematics. This research is a heuristic. This study employed the descriptive method of research to determine the factors affecting student performance in General Mathematics: Basis for intervention activities

Keywords : Ranking, Weighted Mean, Percentage, Interest, Study Habits, Teacher Traits, Teaching Skills And Teaching Materials.