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IM Magic Bilao and the Mastery Level of Grade 10 Students in Mathematics

Ariston G. Vasquez, Marisol S. Garcellano


Circle is one topic that teachers find difficult to present in ways that the students easily understand. Without using instructional material, students spend more time drawing diagrams and making calculations; which does not allow them more time to explore the characteristics of different circle theorems. Hence the need to find better ways of teaching the topic and thereby improve students’ mastery level of the topic led to this study that explored the impact of using IM Magic Bilao to teach selected topics in circle on Grade 10 students’ achievement.

A total of 48 grade 10 students enrolled in the Science, Technology and Engineering (STE) program of Narra National High School were identified as the respondents through purposive sampling. Diagnostic and summative tests for mathematics process skills which contain multiple-choice and open-ended questions adapted from the Learner’s Material and Teacher’s Guide issued by the Department of Education were used in data gathering. The students obtained mean percentage scores of 51.19 classified as average mastery and 87.38 categorized as approximating mastery, respectively, before and after the utilization of the Instructional Material (IM) Magic Bilao. Thus, it can be noted that the instructional material used is effective in increasing the mastery level of Grade 10 students in the least-mastered competencies.

This study recommends that since students taught mathematics using instructional materials perform better than when they were taught mathematics using abstract mathematics symbols only, they should be taught by the use of instructional materials for better performance in mathematics.


Circle, Instructional Material, Mastery Level

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Department of Education.

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