The low levels of mathematical communication and problem-solving skills among elementary school students in Indonesia are a serious concern, as reflected in the 2019 TIMSS scores, which fell below the international average (397 out of 487), and the PISA report, which indicates that Indonesian students’ higher-order thinking skills still lag behind those of other Southeast Asian countries. The dominance of conventional, teacher-centered teaching methods is considered one of the main factors hindering the development of these two 21st-century competencies. This study aims to analyze the effectiveness of the Project-Based Learning (PjBL) model as an alternative instructional strategy for developing elementary students’ communication and problem-solving skills in mathematics. The study employed a quasi-experimental method with a pre-test and post-test control group design, involving 60 fifth-grade students from two elementary schools in South Jakarta. Data were collected through problem-solving ability tests, mathematical communication assessment rubrics, and learning observation sheets. The results showed that students who learned using PjBL demonstrated significant improvements in problem-solving skills (t = 4.523, p < 0.001, Cohen’s d = 1.12) and mathematical communication (t = 3.876, p < 0.001, Cohen’s d = 0.95) compared to the control group using conventional learning methods. The improvement in the experimental group reached 41% for problem-solving and 44% for mathematical communication, while the control group improved by only 16% and 15%, respectively. These findings indicate that PjBL proved effective in the context of this study and demonstrate its potential for continued use as a learning strategy to develop 21st-century skills in mathematics education at the elementary school level. Keywords: Project-Based Learning, Mathematical Communication, Problem Solving, Elementary School Mathematics Learning, 21st Century Skills
Jaringan kolaborasi para penulis
15 penulis ·
36 tautan kepenulisan bersama
· 12 lintas organisasi
Arahkan kursor atau ketuk sebuah nama untuk menyorot rekan penulisnya. Klik dua kali untuk membuka halaman penulis.
Indonesia Open University
State University of Malang
National Chiayi University
Yangon University of Education
State University of Semarang
Afiliasi tidak diketahui
Organisasi berbeda
Organisasi sama
Afiliasi tidak diketahui
Garis lebih tebal = lebih banyak artikel bersama · lingkaran lebih besar = lebih banyak artikel
Afiliasi berasal dari OpenAlex; metadata OAI-PMH jurnal tidak memuatnya. Penulis tanpa ID OpenAlex dicocokkan berdasarkan nama, sehingga dua orang bisa tergabung atau satu orang bisa terpisah.