Development of Critical Thinking Skills in Grade7 Students at Sarawittaya School by Using the GPAS Five-Step Process in the Mathematics Curriculum
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This study aimed are 1) to determine the effectiveness index for analytical thinking skills among grade 7 students exposed to GPAS-5 learning for the topic of ratios and percentages 2) to compare learning outcomes on the topic of ratios and percentages for grade 7 students before and after teaching using the GPAS-5 approach and 3) to assess the satisfaction of grade 7 students with the learning process using the GPAS-5 approach, specifically on the topic of ratios and percentages. The sample group consisted of 40 grade 7 students in their second semester (academic year 2024) at Sarawittaya School in Bangkok, Thailand, selected through cluster random sampling.The research instruments included lesson plans, a critical thinking skills test, and a learning outcome record. Data were analyzed to study critical thinking skills development using the GPAS five-step process through means, standard deviations, percentages, and dependent t-tests. The development of critical thinking skills using this process showed significant improvement among the students. Students’ critical thinking skills increased by 69.23% from pre-test to post-test (effectiveness index = 0.6923), indicating that post-test critical thinking skills were significantly higher than pre-test skills (p < .05). And the overall satisfaction of the students was at the highest level, with an average score of (=4.71,S.D.=0.04)
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