THE EFFECTS OF LEARNING ACTIVITY USING OPEN APPROACH IN SURFACE AREA AND VOLUME UPON MATHEMATICAL PROBLEM SOLVING ABILITY OF MATTHAYOMSUKSA 3 STUDENTS AT PRACHUAP WITTAYALAI SCHOOL IN PRACHUAPKHIRIKHAN PROVINCE

Abstract

The objective of this research was to study mathematics problem solving ability in the topic of Surface Area and Volume of Mathayom Suksa III students in the group receiving learning activities management using the open approach with the counterpart ability of students in the group receiving normal learning activities management.

The research sample consisted of 94 Mathayom Suksa III students in two intact classrooms, each of which consisting of 47 students, of Prachuap Wittayalai School in Prachuap Khiri Khan province during the first semester of the 2019 academic year, obtained by cluster random sampling.  The employed research instruments comprised (1) learning management plans in the topic of Surface Area and Volume for the learning activities management using the open approach; (2) learning management plans in the topic of Surface Area and Volume for the normal learning activities management; and (3) a scale to assess mathematics problem solving ability in the topic of Surface Area and Volume with the Difficulty values between 0.48 – 0.63, Discrimination values between 0.38 – 0.60 and Reliability value of 0.60 . The statistics employed for the data analysis were mean, standard deviation, and t-test.

The research findings showed that the mathematics problem solving ability in the topic of Surface Area and Volume of Mathayom Suksa III students in the group receiving learning activities management using the open approach was significantly higher than the counterpart ability of the students in the group receiving normal learning activities management at the 0.01 level of statistical significance.