The Increasing of Mathematical Creative Thinking Ability and Self-Efficacy of Junior High School Students Through Open-Ended Approach

The purposes of this study are : 1) To describe the presence or absence of an increase in mathematical creative thinking skills of students taught through an open-ended approach. 2) To describe the presence or absence of an increase in mathematical selfefficacy of students taught through an open-ended approach. 3) To describe the presence or absence of interaction between learning approaches with student's early mathematical ability to increase student's mathematical creative thinking ability. 4) To describe the presence or absence of interaction between learning approach with student's early mathematical ability to increase student's mathematical self-efficacy. This research is a quasi-experimental research. The population of this research is all of students class VII Junior High School 17 Medan Semester Odd Year 2017/2018. And randomly selected two classes. The experimental class is taught with an open-ended approach and control class with conventional learning. The instruments used consisted of: tests of mathematical creative thinking ability and self-efficacy questionnaires. Data analysis was done by 2-way ANOVA test. Based on the results of the analysis obtained research results are: 1) There is an increase of student's mathematical creative thinking ability which is taught using openended approach. 2) There is an increase in mathematical self-efficacy of student's taught using an open-ended approach. 3) There is no interaction between learning approach with student's early mathematical ability to increase student's mathematical creative thinking ability. 4) There is no interaction between learning approach with student's early mathematical ability to increase student's mathematical self-efficacy.