Pengembangan Poster Digital Kontekstual Segitiga dan Segiempat untuk Meningkatkan Pemecahan Masalah Siswa

Qiyamul Fajri; Caswita Caswita; Chika Rahayu

doi:10.31932/j-pimat.v8i2.7550

Pengembangan Poster Digital Kontekstual Segitiga dan Segiempat untuk Meningkatkan Pemecahan Masalah Siswa

Qiyamul Fajri, Caswita Caswita, Chika Rahayu

Abstract

Problem solving is a core competence in mathematics, yet seventh-grade students still struggle with contextual problems on triangles and quadrilaterals. This study aimed to develop a contextual digital poster and to examine its validity, practicality, and preliminary effectiveness in supporting students' mathematical problem-solving ability. This research and development study applied the ADDIE model (analysis, design, development, implementation, and evaluation). A limited trial was conducted with 30 seventh graders at Azzahra Islamic Junior High School, Lampung, using a one-group pretest-posttest design without a comparison group. The instruments were expert validation sheets, teacher and student response questionnaires, and an essay test based on Polya's four steps. The material expert validation averaged 4.33 and the media expert validation averaged 4.38 (both very valid); the responses of one teacher and 30 students averaged 4.35 and 4.41 (very practical); classical completeness rose from 20.00% to 80.00% with a mean N-Gain of 0.58 (moderate). The contextual digital poster is feasible for use and shows preliminary evidence of effectiveness. However, because the design has no comparison group, the score gain cannot be attributed to the poster alone, and further research with a control group is needed.

Keyword: digital poster, contextual, problem solving, triangles and quadrilaterals, ADDIE

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DOI: https://doi.org/10.31932/j-pimat.v8i2.7550