A study of Mathematical Critical Thinking Abilities on Linear Equation System in Two Variables of Grade 9 Students with Learning Activities Using Mathematical Modelling
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Abstract
The objectives of this research were to study 1) the approach to use mathematical modelling to develop mathematical critical thinking abilities and 2) mathematical critical thinking abilities on Linear Equation System in Two Variables of grade 9 students with Learning activities using mathematical modelling between before learning and after learning. The sample consisted of 39 grade 9 students in the second semester of the academic year 2021, obtained by a cluster sampling. The research instruments included lesson plans, worksheets and mathematical critical thinking abilities tests. Data were analyzed using frequency, percentage, mean, standard deviation, dependent sample t-test, and content analysis.
The results showed that 1) the learning activity using mathematical modelling that develops mathematical critical thinking abilities should be implemented under an emphasis on teachers’ use of problematic situations that are complicated and connected to the real life of students with a variety of contexts. Students should be prepared for content knowledge that is necessary to solve the problem. The teacher should encourage students to think and learn according to the steps of the mathematical modelling process by using questions. Allowing students to participate in discussion and share their ideas. enabled the students to efficiently solve problems and make decisions in complex problem situations by utilizing their mathematical critical thinking abilities. And 2) the posttest of mathematical critical thinking ability of the students was higher than the pretest at the .05 level of significance.
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