%T THE APPLICATION OF THE PROJECT BASED LEARNING MODELS ON THE  REASONING MATHEMATICS OF  THE FOURTH GRADES STUDENTS OF  ELEMENTARY SCHOOL KARANGWUNI 1 IN THE IMPLEMENTATION OF CURRICULUM 2013
%J Proceeding of  International Conference On Research, Implementation And Education  Of Mathematics And Sciences 2015 (ICRIEMS 2015), Yogyakarta State University, 17-19 May 2015
%D 2015
%I Faculty of Mathematics and Sciences Yogyakarta State University
%L UNY22980
%A . Satrianawati
%A Rahardini Anindita
%X This research aimed to describe the effect of project-based learning models on the reasoning mathematics of the fourth grade elementary school students of Karangwuni 1.
This research was a pre experimental design using one group pretest posttest conducted in one group without comparison groups. The population was 13 students of the fourth grade elementary school students of Karangwuni 1.
The results of this research showed the value of pretest before the applied project-based learning model suggested students was on the category D and D+. The category D+ as much as 6 students or with the value of 46,15% while the rest was on category D as much as 7 students or with the value of 53,84%. These results indicated the success student learning had not occurred or the value of 0% was below the value of B. The result of posttest showed all the students was on the category A+  or with the value of 100%. This percentage value exceeded the standards established 80% of students was success student learning standards was defined in the research. The results of the research using the t-test earned data tval > ttab or 629,561 > 2,064. Accordingly, the model of project-based learning had a positive and significant effect on the mathematical reasoning of the fourth grade elementary school students of Karangwuni 1. 
Keywords: project-based learning & reasoning mathematics students.