A STUDY OF MATHAYOMSUKSA II STUDENTS’PROOF ABILITIES ON PARALLEL VIA CONJECTURING AND PROVING APPROACH WITH GEOGEBRA PROGRAM
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Abstract
The purposes of this study were as follows: 1) to study the proof abilities of Mathayomsuksa II students on parallel after being taught through the conjecturing and proving approach with GeoGebra program. 2) to compare their mathematical attitudes before and after being taught through the conjecturing and proving approach with GeoGebra program. The participants selected by a method of cluster random sampling were 40 Mathayomsuksa II students from Samutsakhonburana school in Samutsakhon province, during the second semester of the 2019 academic year. Percentages, mean ( ), standard deviation (S.D.), Z-test for population proportion and t-test for dependent sample were employed in analyzing data. The research instruments of this study were: 1) lesson plans that allowed students to learn the topic via conjecturing and proving approach with GeoGebra program, 2) the proof abilities test on the topic of parallel, and 3) the questionnaire for measuring mathematical attitudes. The study findings revealed that: 1) after being taught by the conjecturing and proving approach with GeoGebra program, over 60% of the participants had proof abilities on parallel score that satisfied the criteria at a significant level of .01, and 2) student’s mathematical attitudes were significantly higher than before the experiment at the level of .01
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