THE DEVELOPMENT OF MATHEMATICS LEARNING ACHIEVEMENT ON PYTHAGORAS’ THEOREM OF MATTHAYOM SUEKSA TWO STUDENTS AT THUNGSONG SCHOOL USING THE SSCS TECHNIQUE WITH CONSTRUCTIVISM

Abstract

          In this thesis, the researcher develops (1) lesson plans on Pythagoras’ theorem using the SSCS technique with constructivism to meet the efficiency criterion of 80/80; compares (2) the mathematics learning achievement prior to and after the study of the students under study using the SSCS technique with constructivism; and examines (3) the student satisfaction with the SSCS technique with constructivism.

          The one group pretest-posttest design research technique was employed. The sample population consisted of forty Matthayom Sueksa Two students from Room 2/5 at Thung Song School, Nakhon Si Thammarat province in the first semester of the academic year 2025 using the technique of cluster random sampling with classrooms as sampling units. The research instruments consisted of the following: 1) Nine mathematics lesson plans on Phythagoras’ theorem using the SSCS technique with constructivism for ten periods with an average score ranging from 4.98-5.00; 2) a four-option multiple choice mathematics learning achievement test of twenty-five items with the difficulty index (p) of 0.31-0.52, discriminatory power (r) at 0.31-0.64, and reliability at 0.88; and 3) a five-rating scale questionnaire of thirteen items eliciting the satisfaction of the students under study with the mathematics learning using the SSCS technique with constructivism. The researcher employed a computer program in calculating the fundamental statistics of percentage, mean, and standard deviation. The hypothesis test was conducted using the dependent t test at the statistically significant level of .05.

          Findings are as follows. 1) The lesson plans on Pythagoras’ theorem using the SSCS technique with constructivism exhibited an efficiency of 86.25/80.10, greater than the set efficiency criterion of 80/80. 2) The mathematics learning achievement of the students under investigation after the study was higher than prior to the study at the statistically significant level of .05. 3) The student satisfaction with the mathematics learning using the SSCS technique with constructivism was at a high level overall.