The Effectiveness of Learning Tools Based on Discovery Learning That Integrates 21st Century Skills to Mathematical Critical Thinking Ability in Trigonometric Materials in High School

Abstract

This study aims to determine the effectiveness of discovery learning based learning tools that integrate 21st-century skills in trigonometric material on the mathematical critical thinking skills of students in high school. This research is a pre-experimental study with a one-group pretest-posttest design. The tools used are the syllabus, lesson plans, and student's worksheets. The learning tools used have gone through the validation process and previous practicality tests. The effectiveness test was conducted in class XI MIPA 1 SMA Babussalam Pekanbaru. In the effectiveness test stage, the researcher gave a mathematical critical thinking ability test after completing the learning using the developed device. Indicators of mathematical critical thinking skills used are interpretation, analysis, evaluation, verification and inference. The test results show that there is an increase in each indicator of critical mathematical thinking used and the percentage of students who reach the passing grade test of mathematical critical thinking skills reaches 82.14%. So it can be concluded that the learning tools developed are effective for use. The data obtained from the critical thinking skills test results were not normally distributed based on the normality test, so to find out differences in students' critical thinking skills before and after using the device, researchers used the Mann Whitney test. Based on the results of the Mann Whitney test, it is known that the mathematical critical thinking skills of students after using the device are better than before using the device with an N-Gain value of 0.70 with a high increase category.