R. Amiyani, J.B. Widjajanti
The aimed of this research is to describe the effect of guided discovery learning in scientific approach toward student achievement and self-confidence. This research is quasi-experiment with the pre-test post-test design. The study was conducted in grade 7, with an age range of about 12-13 years, in one of the schools in the suburbs with the quality of students input being in the middle category. The data collected by using mathematics achievement test and self-confidence questionnaire that has been declared valid by the expert team. The criterions of effective are: 1) post-test score is higher than pre-test score; 2) the average of student achievement score is higher than 75; 3) the average of self-confidence score is higher than medium category; 4) the proportion of student that pass the achievement criterion is more than 70%; and 5) the proportion of student self-confidence that reaches very high and high is more than 70%. The result of this research showed that guided discovery learning in scientific approach is effective on students' mathematics achievement and self-confidence. © 2018 Published under licence by IOP Publishing Ltd.
Postgraduate Program, Universitas Negeri Yogyakarta, Jl. Colombo No. 1, Yogyakarta, Indonesia; Department of Mathematics Education, Universitas Negeri Yogyakarta, Jl. Colombo No. 1, Yogyakarta, Indonesia
