Development of Mathematical Learning Tools through Discovery Learning Based on Lesson Study for Learning Community and their Influence with Students’ Problem Solving

Abstract

Problem solving ability is one of the competencies that students must have to face various complex problems. However, in realit y, the students’ problem solving ability is still low.Therefore, this research aimed at developing the mathematical learning media through Lesson Study For Learning Community-based discovery learning on the Linear equation system of two variablematerial on the VIII grade and its influence on the students’ problem solving abilit y. This research used MixedMethods

method. Qualitative research using the Thiagarajan model with the R and D method, while the quantitative method used quasi-experimental non-equivalent control group design. The research subjects were the students of MTsN 1 Lumajang consisted of 2 classes that were class 8C(control class) and class 8A(experiment class). Based on the results of normality and homogenity variance tests,it obtained the data that are normally and homogent distributed. Therefore it needed data analysis by using independent sample t-test analysis. Based on the results of the research revealed that: (1) produced the learning media that were categorized as valid, practical and effective (2) LSLC-based discovery learning had a significant effect on the students’ problem solving ability in solving problems with the significant value of 0,000 (p<0,05).