This study aims to produce a two-variable linear equation system learning tool using the Problem Based Learning model for students of Santa Rosa De Lima Tondano Catholic Middle School. This research method is a descriptive method. At the research, development stage, the device development model used in this study was a modified 4-D model. The learning tools developed are the Learning Implementation Plan, Student Activity Sheets, and Evaluation of Learning Outcomes. Based on the results of the descriptive analysis, it was found that the development of the Problem Based Learning model of learning produced good learning tools because it met valid criteria based on expert opinion, the ability of teachers to carry out learning was also good, Students were active during the learning process, students gave positive responses to learning, and evaluation of results. Learning meets the criteria of valid, sensitive, and reliable. Based on the descriptive analysis, it can be concluded: (1) The development research carried out at Santa Rosa De Lima Tondano Catholic Junior High School with the research subjects being students of class VIII in the 2019/2020 school year has produced learning tools that are valid, practical, and effective after being tested and through the process. Content validation. The tools developed are the Learning Implementation Plan, Student Worksheets, Evaluation of Learning Outcomes with the Problem Based Learning model on the material of the two-variable linear equation system, (2) Validated learning devices produce data with valid criteria, (3) In terms of practicality, the tool, learning is in the very practical category according to student responses or responses, and (4) Effective learning tools in terms of the Teacher Readiness Level which are in the very good category and the percentage of classical completeness is in the very good classification.

Tujuan penelitian ini adalah mengkaji dampak penerapan strategi matematika realistik berbasis STAD terhadap hasil belajar siswa pada materi SPLDV. Penelitian ini menggunakan pendekatan kuasi eksperimen yang terdiri dari desain kelompok kontrol yang tidak seimbang. Subyek penelitian ini adalah kelas VIIIA yang dipilih secara acak, kelas eksperimen sebanyak 26 siswa, dan VIIIB, kelas kontrol sebanyak 26 siswa, keduanya dari SMP Negeri 1 Tenga tahun pelajaran 2022/23. Data yang terkumpul terdiri dari hasil posttest kelas eksperimen dan kelas kontrol, dengan rata-rata hasil belajar kelas eksperimen ????̅E = 80.77 dan rata-rata hasil belajar kelas kontrol ????̅K = 72.96. Pengujian data dengan taraf nyata = 0,05 menghasilkan = 2,625 = 2,009, maka tolak Ho. Penelitian ini menyimpulkan bahwa rata-rata hasil belajar siswa yang menggunakan model penerapan pendekatan matematika realistik sesuai STAD lebih besar dibandingkan dengan siswa yang menggunakan model pembelajaran langsung.