Articles

Development of Learning Tools Assisted by Lumio By Smart to Improve Mathematical Problem Solving Ability

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This study aims to describe the process and results of the development of learning tools assisted by Lumio by SMART on flat building material to improve the mathematical problem solving skills of junior high school students in grade VII. At Sunan Kalijogo Junior High School, students’ ability to solve varied geometry problems is still low. Students tend to focus on the end result without understanding the solution strategy, so they are only able to solve the problems that are modelled by the teacher. This research uses the 4D development model. The validation results showed the device was very valid (score 3.71). The learning was well implemented, student activeness reached 93.6%, and student response was 90.71%. Classical completeness reached 89.4% with ability improvement in the moderate to high category. The independent sample t-test resulted in a significance of 0.000 (<0.05), showing a significant difference between the experimental and control classes. Thus, the device developed was declared valid, practical, and effective. The implementation of the device also increased the involvement and motivation of seventh grade students of Sunan Klijogo Junior High School, as well as creating a collaborative learning environment and supporting a significant increase in mathematical problem solving ability. This research can be a reference for the development of innovative learning, and is recommended to be applied to other materials to improve mathematical problem solving skills.

Developing the Geometry Teaching Module by Using a Metacognitive Approach in Kurikulum Merdeka to Improve the Students’ Critical Thinking Skills

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This research aims to solve the problem of students’ critical thinking skills to follow instructions in solving mathematical problems. Students are often unaware of what they do, why they do it, and do not even know what they are supposed to do with the assignment. Meanwhile, to be a good problem solver, someone must develop good metacognition skills. By having metacognitive awareness, students are trained to solve mathematical problems through the stages of planning, monitoring, controlling and evaluating. The method used in the research is Research and Development with the model developed by Thiagarajan, Semmel & Semmel (4-D). The data collection was based on the pre-test and post-test scores in the experimental and control groups to measure the students’ critical thinking skills. The result of the post-test in the students’ critical thinking skills by using ANOVA test with significance level in 0.016 (< 0.05) shows that there was significant difference of teaching module with metacognitive approach in the material about circle within Kurikulum Merdeka to the students’ critical thinking skills.

Ethnomathematics Exploration in Coffee Planting Activities at Durjo Jember Plantation

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Ethnomathematics refers to the apllication of mathematics in social and cultural life. This study aims to explore and describe ethnomathematics in coffee planting activities carried out by coffee farmers in Durjo Plantation, Jember which involves mathematical concepts. This type of research is a qualitative research with an ethnographic approach. The data collection method uses observation, documentation, and conducts in-depth interviews with 3 farmers who will be labeled with S1, S2, and S3. The results of data collection were carried out and analyzed descriptively. This research found that in the activities of coffee farmers involving mathematics, there are mathematical elements including the concepts of flat building, building space, revival, concongruence, translation, reflection, and rotation.