Abstract
The main purpose of this study was to determine the effectiveness of the Project-Based Learning Approach in the concepts of conic sections (circle, parabola, hyperbola, and ellipse) to the thirty (30) students of Grade Eleven-Tourmaline of President Quirino National High School - Senior High School. The set of thirty-item (30) questionnaire was used for the conduct of pretest and posttest. And, the students' performance rubric was used to assess the student’s presentation of their outputs. This study applied experimental design specifically using one-group pretest-posttest design. The results of the pretest and posttest were subjected to statistical treatment to determine if there is significant difference where two-tailed t-test was used as a statistical tool at 0.05 level of significance. Based on the findings, the pretest and posttest result of the focus group has significant difference in which the hypothesis is rejected. This implies that the use of Project-based Learning approach in learning conic sections is effective.
