Building of the Students Capability on the Problem Solving and Mathematical Communication through Realistic Mathematics Indonesia Approach (PMRI)
This study aimed to describe the learning process of using Realistic Mathematics Indonesia Approach as the solution to buildthe students ability on problem solving and mathematical communication and to know the result of application of thisapproach. The type of this research was Classroom Action Research. The procedure of this study wasdone twocycles; eachcycle consists of four steeps: planning, action, observation, and reflection. The subject of this study was the fourth grade ofelementary school at I Kaligesing, which are 17 students. The research instrument includes sheets observation and tests.Sheet Observation was used to obtain data on religiosity and social students during the students‘ learning, while the test wasused to measure the ability of mathematical problem solving and communication students. The core of these activitiesinclude: delivery of realistic problems, group discussions, presentations and conclusions. The rate of spiritual aspects ofstudents in the first cycle was obtained average 5.96, and the second cycle was obtained average 6.83. For the assessment ofthe social aspect, the liveliness indicator increased by 6% from the first cycle to the second cycle, the indicator ofcooperation obtained 10% increase and the tolerance indicator obtained an increase of 10% from the first cycle to the secondcycle. The results of the measurement of problem-solving skills in the initial conditions obtained an average of 50.15, in thefirst cycle obtained a mean of 64.12, and then at the second cycle were obtained average of 74.41. As for the measurement ofthe results mathematical communication skills, in the initial conditions only gained an average of 48.6, after the first cycleobtained average of 65.71, and the second cycle was obtained 75.23. From these results it can be concluded that theapplication of PMRI can increase student‘s ability on the problem solving and mathematical communication