Skripsi
DESIGNING LOCAL INSTRUCTIONAL THEORY FOR MEASURES OF CENTRAL TENDENCY USING WATER PH CONTEXT TO SUPPORT STUDENTS' CRITICAL THINKING SKILLS
A local trajectory is a series of mathematical activities designed to facilitate the development of students' understanding of learning objectves. This study aims to develop a Local Instruction Theory (LIT) for teaching the concepts of central tendency (mean, median, mode), and to explore how students develop their understanding informally using the context of pH water to support students' critical thinking skills. The research employed a design research method, which consists of three stages: preliminary design, design experiment (pilot experiment and teaching experiment), and retrospective analysis. This study involved 6 students with varying abilities (high, medium, and low) in the pilot experiment, and 29 eight-grade students in the teaching experiment at Junior High School. Data collected through classroom observations, tests, and documentation were analyzed descriptively. The tests aimed to measure the improvements made by students, while classroom observations, interviews, and documentation were used to develop the LIT. The results of this study produced a LIT with three activities: 1) Students observe water quality using litmus paper to measure pH to collect and present data, 2) Students discover how to determine the mean, median, and mode by collecting data on their own; 3) Students developed a formal concept based on their own knowledge. Keywords: Central tendency concept, critical thinking skills, design research, pH water context.
No other version available