The research study aimed to identify the pupils' skill in proving mathematical concepts about tangents and secants of circles using Van Hiele's instructional model. Quasi - experimental method of research was used in this study. The study was conducted during the first semester of S.Y.2017 - 2018 using fifteen students from Grade 10 as the participants of the study. Participants were given a pretest prior to the discussion about tangents and secants of circles and posttest was administered after the instruction using the Van Hiele's Instructional Model's five levels of learning. The results were then statistically evaluated, analyzed, and interpreted. Percentage, mean and t-test were utilized to analyze and interpret the data. Qualitative analysis was drawn from the descriptive rating of the selected 15 participants of the experimental group. This study found out that the participants with the use of Van Hiele Instructional Model showed poor and satisfactory performances on the pretest and very satisfactory and excellent on the posttest. Moreover, the participants showed improved scores in all levels in their mathematics performance. On the pre-test and posttest mean scores of each student, high performing participants improved their skills in Mathematics from Level 1 to level 5 instructional model. Average performing participants and low performing participants also showed improvement from their pre-test mean scores to their posttest mean scores. Van Hiele Instructional Model is effective.
Melchor Del Rosario, Don Jesus Gonzales High School, The Philippines
Stream: Primary & Secondary Education
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