eng Science and Education Publishing American Journal of Educational Research 2327-6150 2023-04-21 11 4 235 240 10.12691/education-11-4-7 EDUCATION20231147 article Jonah L. Antipuesto 1 Denis A. Tan denistan@cmu.edu.ph 2 Secondary School Laboratory, Bukidnon State University, Malaybalay City, Bukidnon, 8700 Philippines Science Education Department, Central Mindanao University, University Town, Musuan, Bukidnon, 8710 Philippines Blended Learning deals with student acquisition of knowledge via electronic and online media and the use of printed modules. This study examined the mathematics performance and engagement of students via blended learning at Kalilangan National High School. It aimed to (a) ascertain the level of students¡¯ academic performance when exposed to Blended Learning in terms of pretest and posttest; (b) find out the level of students¡¯ engagement when exposed to Blended Learning in terms of pretest scores and posttest scores; (c) determine if a significant difference exist between pretest and posttest scores of students' academic performance before and after exposure to Blended Learning; and (d) determine if a significant difference exists between the pretest and posttest scores of students' engagement in Mathematics when exposed to Blended Learning. The study used the one-shot pretest-posttest research design. It was conducted at Kalilangan National High School with the Grade 10 students as participants during the pandemic. The academic performance and engagement of students in Mathematics were gathered from the participants using validated instruments to answer the research problems. Results showed that students have very low performance in the pretest while moderate in the posttest. Findings revealed that there is a highly significant difference in the academic performance in Mathematics between pretest scores and posttest scores. Paired t-test showed that there is a highly significant difference between the pretest and posttest scores of the students' engagement level in Mathematics when exposed to the Blended Learning approach. http://pubs.sciepub.com/education/11/4/7/education-11-4-7.pdf academic performance engagement mathematics blended learning