Enhancement Of Mathematical Reasoning Ability At Senior High School By The Application Of Learning With Open Ended Approach

The objective of this research is to investigate the differences of students’ enhancement of mathematical reasoning ability as the result of the application of learning with open ended approach and conventional learning. The population in this research was the entire students in high schools and Aliyah in Bandung. The sample is students on grade X. Two classes are randomly selected from each school, one class as an experiment class (open-ended approach) and another class as a control class (conventional learning). The instruments used include mathematical prior knowledge test, mathematical reasoning test, and guidelines for observation. The results of data analysis show that if it is viewed as a whole, students’ enhancement of mathematical reasoning who had treated with instruction using open-ended approach was better than students who had treated with regular instruction. There is interaction between learning approach and school levels towards students’ enhancement of mathematical reasoning. There is no interaction between learning approach and the initial of mathematical ability towards students’ enhancement of mathematical reasoning. Keywords: Open Ended Approach, Conventional, and Mathematical Reasonin