Vol. 4 No. 1 (2026): pijme

Volume 4, Issue 1 (2026) of the Polyhedron International Journal of Mathematics Education (PIJME) presents four research articles contributed by scholars from Indonesia, Malaysia, Mexico, and the Philippines, reflecting the journal's continued international reach in mathematics education research. This issue highlights instructional-model interventions, technology-enhanced learning media, and ethnomathematics-based instructional development across junior and senior secondary education contexts. The articles explore a range of themes, including the application of a Problem-Solving learning model to strengthen eleventh-grade students' self-confidence and mathematics learning outcomes, as well as a didactical design study integrating the Think-Talk-Write (TTW) strategy with GeoGebra to simultaneously develop tenth-grade students' mathematical communication and collaborative learning. Gamified, technology-enhanced assessment is also featured through the use of Quizizz in paper mode to increase junior secondary students' interest in learning mathematics, filling a gap in research on offline/paper-based gamification. In addition, this issue introduces a culturally grounded instructional innovation through the ethnographic exploration and ADDIE-based development of an ethnomathematics learning module derived from the traditional house and accessories of the Dayak Bumi Segandu Indramayu Tribe, translating embedded three-dimensional geometry concepts into a validated, classroom-ready resource. Collectively, the studies in this issue contribute empirical and developmental insights into strengthening confidence, communication, engagement, and cultural connectedness in mathematics learning across diverse educational settings.