A.S. Hidayat, D. Haryanto
As an effort to improve the quality of learning in the classroom, a teacher needs to consider an effective and appropriate learning model, so that it can develop mathematical cognitive skills and student's engagement. A learning model issued in this investigation is Problem Based Learning (PBL), which is implemented to IX grade students of SMP Laboratorium Percontohan UPI. This investigation is aimed to (1) measure, (2) find out the improvement process, and (3) improve mathematical cognitive skill and student's engagement toward curved-face three-dimensional objects using PBL model. The result of this investigation shows that the mathematical cognitive skill and students' engagement can be improved. The average score test in cycle I is 69.9, then 81.7 in cycle II and become 85.8 in cycle III. Furthermore, this PBL model is able to improve the student's engagement and accomplishment. In cycle I, the student's accomplishment reach 34.37%, in cycle II reach 75%, then reach 90.625% in cycle III. From these results, the investigator concluded that PBL model can improve students' mathematical cognitive skills and engagement. Therefore, the investigator suggests that the PBL model can be applied by teachers to other materials dan used as an alternative in learning mathematics at school. © 2019 IOP Publishing Ltd.
Department of Science Education, Universitas Pendidikan Indonesia, Bandung, Indonesia
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