The Effects of Activities Management According to The GPAS 5 Steps Process on Mathematics Learning Achievement of Grade 3 Students

Background and Aim: Mathematics learning progresses systematically, starting from fundamental knowledge to analytical thinking and complex problem-solving. Given the significant role of mathematics in 21st-century education, it enhances creativity, logical reasoning, and decision-making skills necessary for solving problems effectively and appropriately. This research aims to: 1) Compare the mathematics learning achievement of third-grade students before and after learning through the GPAS 5 Steps Process. and 2) Compare the post-learning mathematics achievement of third-grade students who have undergone the GPAS 5 Steps Process instructional process with the 70% criterion. Materials and Methods: This study employs a quantitative research design with a quasi-experimental approach. The sample group consisted of 27 third-grade students from a single classroom at the Demonstration School of Valaya Alongkorn Rajabhat University, under the Royal Patronage, in Pathum Thani Province, during the 2023 academic year. The sample was selected using a cluster sampling method. The research instruments included: 1) Six lesson plans for teaching multiplication in mathematics using the GPAS 5 Steps Process, with each lesson lasting 2 hours, totaling 12 hours. and 2) A mathematics achievement test on multiplication, consisting of 30 items. The statistical methods used for data analysis included percentages, means, standard deviations, and hypothesis testing using a t-test. Results: 1) After activities management according to the GPAS 5 Steps Process, the students mathematics learning achievement of grade 3 students was higher than before at a significance level of .05 (M = 24.37, SD = 2.79, t = 25.671, p = 0.000) and 2) after activities management according to the GPAS 5 Steps Process, the students mathematics learning achievement of grade 3 students was higher the determined criterion set at 70% at a significance level of .05 (M = 24.37, SD = 2.79, t = 6.278, p = 0.000) Conclusion: The GPAS 5-Step Process is an effective method for enhancing students' mathematics achievement. It provides a structured and sequential learning approach, ensuring that students who participate in this learning process achieve post-learning mathematics scores that surpass the predetermined criterion.