This research is to find out how to improve the performance of outstanding Raudhatul Athfal (RA) teachers in Yogyakarta and how the steps are and how the key to the successful performance of outstanding RA teachers in Yogyakarta. This research is a qualitative research through a psychological approach that is carried out directly to the object…

Creative thinking is very important in the modern era so that it should be improved by doing efforts such as making a lesson that train students to pose their own problems. The purposes of this research are (1) to give an initial description of students about mathematical creative thinking level in Problem Posing Model with Lesson Study approach…

Differential equations is a branch of mathematics which is closely related to mathematical modeling that arises in real-world problems. Problem solving ability is an essential component to solve contextual problem of differential equations properly. The purposes of this study are to describe contextual teaching and learning (CTL) model in…