Development of Mathematics Learning Devices with Problem Based Learning Model to Improve Student's Mathematical Connection Ability

This study aims to: (1) analyze how the validity, practicality and effectiveness of learning tools developed through problem based learning models in algebra in class VII SMP Negeri 4 Tarutng; 2) analyze how to increase mathematical connection skills after using learning tools developed through algebraic material models in class VII SMP Negeri 4 Tarutung. This research is categorized into Development Research using the Thiagarajan, Semmel and Semmel learning device development model, namely the 4-D model (Four D Model). This research was conducted at SMP Negeri 4 Tarutung which is one of the junior high schools in Tapanuli Regency, North Sumatra Province. The subjects in this study were grade VII students of SMP Negeri 4 Tarutung, namely grades VII-A and VII-B in the 2021/2022 academic year. The results of the study show that: (1) learning devices with Problem Based Learning are included in the valid, practical and effective categories; (2) The improvement of students' mathematical connection abilities after using the problem based learning model on algebraic material based on the average achievement of students' mathematical connection abilities based on the posttest results of the first trial was 77.75, increasing to 82.25 in the second trial. Thus, there was an increase in the average score of students' connection abilities of 4.5. Keywords: Development of learning tools, Problem Based Learning, mathematical connection ability DOI: 10.7176/JEP/13-13-05 Publication date:May 31st 202