The Effect of Open-Ended Approach Towards Students’ Mathematical Reasoning

Abstract

This research was examining students’ mathematical reasoning by the open-ended approach. This research has a purpose to train students’ mathematical reasoning abilities to think logically and know how much is the effect of open-ended approach to students’ mathematical reasoning abilities. The subjects of this research are the students of 5th grade in elementary school Gugus I, Buleleng sub-district, Bali. The instrument using mathematical reasoning test which made by the researcher with reference to indicators of mathematical reasoning abilities of P4TK Yogyakarta. This research is a quasi-experiment research with randomized control group pre-test post-test design. The outcomes of the research tell us that in the experimental group, where the students in the experimental group were treated by open-ended approach during the learning process and the students in control group were treated by conventional approach during the learning process. Students’ mathematical reasoning in the experimental group was better than students’ mathematical reasoning in control group after post-test was given. Both groups had similar performance in the pre-test. Both groups were following common work schedule. Open-ended approach gave positive influences on students’ logical thinking abilities.