Implementation of Problem-Project Based Learning Model in Elementary School

This research is motivated by low scientific attitudes and mastery of student concepts in the process of learning Natural Sciences in elementary school.The purpose of this research is to find out the differences in scientific attitudes and mastery of student concepts as a result of the implementation of the Problem-Project Based Learning model.This study used a kuasi experimental method with non-equivalent design (Pretest and Posttest) Control Design, The subject of the study was grade V students at Public Elementary School 1 Kaliori, as many as 34 students.The instruments used are the scale of scientific attitudes and the test of concept mastery.Data analysis in this study using Independent Sample t-test.The findings in this study were every indicator of scientific attitudes and mastery of concepts for the experimental group getting a greater average N-gain from the control group.The average N-gain for each indicator in the experimental group is still in the moderate and low category, while the control group is relatively low.The results showed (1) there is a scientific attitude between students who obtain learning with problem-project based learning and non Problem-Project Based Learning models, average N-gain for Problem-Project Based Learning 0,41 or 41% and non Problem-Project Based Learning 0,37 or 38%.(2) There is an increase in concept mastery between students who obtain learning with Problem-Project Based Learning and non Problem-Project Based Learning models, on ave