Kesalahan dalam memahami konsep menjadi salah satu faktor yang menyebabkan miskonsepsi pada pelajaran matematika. Miskonsepsi pada materi bangun datar disebabkan oleh cara belajar siswa yang hanya menghafalkan bentuk dasar tanpa memahami hubungan antar bangun datar dan sifat-sifatnya. Upaya yang dilakukan dalam mengatasi miskonsepsi tersebut adalah dengan menerapkan pembelajaran konstruktivis. Salah satu model pembelajaran konstruktivis adalah Conceptual Understanding Procedures (CUPs). Tujuan dari penelitian ini adalah untuk mengetahui penerapan model pembelajaran Conceptual Understanding Procedures (CUPs) sebagai upaya mengatasi miskonsepsi matematis siswa pada materi sifat-sifat bangun datar segiempat. Subjek penelitian adalah 12 orang siswa SMP yang mengalami miskonsepsi pada materi sifat-sifat bangun datar segiempat. Teknik pengumpulan data pada penelitian ini melalui tes, video, observasi, dan wawancara. Validitas dan reliabilitas data melalui credibility, dependability, transferability, dan confirmability. Hasil dari penelitian ini menunjukkan bahwa penerapan model pembelajaran Conceptual Understanding Procedures (CUPs) yang terdiri dari fase individu, fase kelompok triplet, dan fase interpretasi seluruh kelas dapat mengatasi miskonsepsi siswa pada materi sifat-sifat bangun datar segiempat. Perubahan miskonsepsi siswa juga dapat dilihat dari nilai tes yang mengalami peningkatan nilai berdasarkan nilai tes awal dan tes akhir siswa. Kata Kunci: Conceptual Understanding Procedures (CUPs), miskonsepsi, segiempat.   ABSTRACT Mistakes in understanding the concept became one of the factors that led to misconceptions in mathematics. The misconceptions in plane shapes are caused by the way of learning of students who only memorize the basic form without understanding the relationship between the plane shapes and its properties. Efforts made in overcoming these misconceptions is to apply constructivist learning. One of the constructivist learning models is Conceptual Understanding Procedures (CUPs). The purpose of this research is to know the application of conceptual learning model Conceptual Understanding Procedure (CUPs) as an effort to overcome students' mathematical misconception on the properties of quadrilateral. Research subjects were 12 students who experienced misconceptions on the properties of quadrilaterals. Data collection was conducted through test, video, observation, and interview. Validity and reliability of data through credibility, reliability, transferability, and confirmability. The results of this study indicate that the application of learning models. Comprising individual phases, triplet group phases, and all-class interpretation phenomena can overcome student misconceptions on quadrilateral properties. Changes in student misconceptions can also be seen from tests that have improved Keywords: Conceptual Understanding Procedures (CUPs), misconception, quadrilateral.

Mathematics is the subject matter that is most difficult by most students. In this study, researchers analyzed students' learning needs to find out what media or learning materials are appropriate for students to learn mathematics class VIII Junior High School 41 Palembang. The data collection techniques used include: 1) questionnaires, knowing the needs of students in the mathematics learning process: 2) observations, knowing the conditions and problems in mathematics learning: 3) interviews with teachers and students. The data analysis technique used is descriptive analysis with data reduction, data presentation, conclusion drawing, and verification. The results of the analysis show that students choose interesting learning media-based learning style, media, internet, and smartphone