The Development of Learning Devices Based on Discovery Learning to Improve Mathematical Creative Thinking Ability of Students Class V at SD Negeri 060827 Medan Amplas

The aims of this study to develop a product in the form of mathematics learning discovery learning which consist: lesson plan, students work sheet,and students textbook.and the purposes of this study to determine: (1) How does the development of learning devices based discovery learning to improve creative thingking of student are practical. (2) How does the development of learning device based discovery learning to improve creative thinking of students are effective. (3) How to increase creative thinking of students by using learning devices based discovery learning approach that has been developed. The device whice was developed consists of: lesson plans worksheets and Las. The population in this students of one class V SD Negeri 060827 Medan Amplas totaling 25 students, by taking samples of one class. as for learning device is developed because in place of researcher less use of learning device even do not use at all so that student less active in process of learning, teacher only as facilitator only and with existence of learning device based on discovery learning researcher can use and practice or apply learning or use device which researchers have done so that it can add insight to researchers The development research. The development process consists of four stage , namely: define, design, develop, disseminate. Result of test I and test II shows that 1)teaching and learning tools developed is valid both in terms of content and construct, 2) teaching and learning tools developed is easily used, 3)teaching and learning tools developed is effective, seen from studens learning complete achievement, student activity in tolerance limit specified and student respone to teaching and learning is considered good, 4) there is a raise in student creative thinking skill from test I 74,25 to 80,33 on test II. Of the data analysis has benn obtained indicates that the learning device-based discovery learning in pecahan material on class V SD Negeri 060827 Medan Amplas is practical and effective. Student’ creative thinking abilities of student has benn increased. Keywords: Learning device, discovery learning, Creative thinking ability