-Journal of Arts, Science & Commerce ■E-ISSN2229-4686■ISSN2231-4172 International Refereed Research Journal ■www.researchersworld.com■Vol.–V, Issue – 4, Oct. 2014 [83] FACTORS THAT AFFECT MATHEMATICS ACHIEVEMENTS OF STUDENTS OF PHILIPPINE NORMAL UNIVERSITY – ISABELA CAMPUS Olive Joy F. Andaya, Philippine Normal University North Luzon, Alicia, Isabela ,Philippines. ABSTRACT The study aimed to identify the factors that affect the achievements of students in Mathematics and to determine the relationship between the students’ achievements and individual, instructional, classroom management and evaluation factors. The 239 Bachelor of Elementary Education (BEEd) students were the subjects of the study. The descriptive- correlational design was used. Data were subjected to statistical analyses using t -test, Pearson r and multiple regression. Findings reveal that 1) achievements of students in Math Courses (Fundamental Mathematics and Contemporary Mathematics) is poor; 2)students perform low in both subjects; 3) mathematics achievements are highly correlated to individual and instructional factors and moderately correlated to classroom management and evaluation factors; 4) individual factor and instructional factor greatly affect achievements in fundamental math; 6) instructional factor is the number one predictor of achievement in contemporary math; 7) instructional factor is the factor that affects most the achievements of students in Mathematics. Keywords: Mathematics achievement, instruction, classroom management, evaluation, teaching effectiveness