DEVELOPMENT OF LEARNING DEVICES ORIENTED MODEL ELICITING ACTIVITIES TO IMPROVE MATHEMATICAL PROBLEM SOLVING ABILITY JUNIOR HIGH SCHOOL STUDENTS

This study aims to develop a learning device-oriented model of eliciting activities (MEA) tested the validity and effectiveness to improve mathematical problem solving ability junior high school students of class VII. This type of research is the development of learning devices with 4-D models of Thiagarajan which consists of four phases: 1) define; 2) design; 3) develop; and 4) disseminate. The subjects were students of SMPN 17 Medan. The results showed that the learning device classified both criteria that meets the requirements of validity and effective. MEA implementation-oriented learning device can improve students' mathematical problem solving ability SMPN 17.