Developing Mathematical Proficiency in Junior High School: A Case Study on Linear Equations in One Variable Siti Maryam Rohimah(1,2), Darhim(2) and Dadang Juandi(2)
1Department of Primary School Education, Universitas Pasundan, Jl. Tamansari No. 6-8, Bandung, Jawa Barat 40116, Indonesia.
2Department of Mathematics Education, Universitas Pendidikan Indonesia, Jl. Dr. Setiabudi No. 229, Bandung, Jawa Barat 40154, Indonesia.
Abstract
The aim of this study was to support the development of mathematical proficiency in Junior High School students, especially on the topic of linear equations in one variable. This research is a case study at a public school in Bandung, Indonesia, involving 25 students. This qualitative study collects data from observations, test results, interviews, and a review of documentation results. The data were analyzed with the stages of data validity, data collection, data reduction, data display, and conclusion drawing/verification. The result showed 1) 72% of students reached a conceptual understanding, 2) 88% of students achieved procedural fluency, 3) 78% of students achieve strategic competence, and 4) 97.5% of students achieve adaptive reasoning and productive disposition. The conclusion of this study is that students^ mathematical proficiency can be developed by designing appropriate learning and learning flows by the teacher and anticipating every student response that appears in the learning process. Recommendations for developing mathematical proficiency in linear equations in one variable topic, start from understanding the concept of closed sentences and open sentences, forms of similarities and equations, understanding, solving, and using linear equations in one variable in real life.
Keywords: Mathematical Proficiency- Linear Equation in One Variable
