Javanese is the regional language with the most speakers in Indonesia and needs to be preserved, because it is the main element in a culture. The purpose of this study is to analyze how the form of preservation of the Javanese language in elementary schools. The method in this research is a qualitative descriptive research method. Data collection was carried out by means of observation, interviews, and tests. The results of the research show that the form of preservation of the Javanese language is carried out by schools in two ways. First, through learning Javanese and Javanese Voice Arts, as well as through Javanese language habituation this is carried out every Thursday. The students' Javanese language skills were divided into two, out of a total of 10 students there were 60% who mastered Javanese according to their level when communicating, while 40% of students had not mastered Javanese according to their level when communicating. The large percentage of students who master the Javanese language according to the rules illustrates that learning and habituating Javanese at school can be used as a means of preserving Javanese and developing Javanese language skills in students.

Mathematical problem solving ability has a close relationship in developing literacy and numeracy in elementary schools. The purpose of this study was to describe mathematical problem solving abilities to develop literacy and describe mathematical problem solving abilities to develop numeracy in elementary schools. This research was carried out in class V SD Negeri Sibela Timur Surakarta City to students with a total of 3 students. The method used in this research is descriptive qualitative research method. Data collection was carried out with tests and documentation. The results of this study indicate that the ability of students to solve mathematical problems is different. Of the 3 students, 1 student has the ability to solve math problems in the good category, 1 student in the medium category, and 1 student in the low category. Mathematical problem solving ability is in line with the results of giving literacy and numeracy questions. Students in the good category get high literacy and numeracy test scores, students in the moderate category get sufficient test scores, and students in the low category get low literacy and numeracy test scores.