A Generalization of the Collinearity of the Stereographic Projection around the Lemoine Point
Vladislav Natchev
American College of Sofia (Bulgaria)
https://doi.org/10.53656/math2025-4-1-gcs
Abstract. Under stereographic projection, the projection point is collinear with the Lemoine points of the projection and the projected triangles or with the centers of their Apollonian circles (Natchev 2025)…
Competency Models for Studying Numerical Sets
Desislava Georgieva
Faculty of Mathematics and Informatics, „St. Cyril and St. Methodius“ University of Veliko Tarnovo
https://doi.org/10.53656/math2025-4-2-cms
Abstract. The study presents a study aimed at expanding students' mathematical competence in studying the concept of number and related concepts...
Improving Students’ Mathematical Competences through Project-based Learning Activities
Veritsa Arsov
South-West University “Neofit Rilski”
Blagoevgrad, Bulgaria
https://doi.org/10.53656/math2025-4-3-ism
Abstract. In the modern Bulgarian school of the 21st century, the issue of using innovative strategies for teaching students from the initial stage of primary education is increasingly being addressed...
Educational Resources with Percentages for the Development of the Visual Estimation
Toni Chehlarova
Institute of Mathematics and Informatics, Bulgarian Academy of Science (Bulgaria)
https://doi.org/10.53656/math2025-4-4-erp
Abstract. Computer models of tasks related to percentage are presented. The files are created with the dynamic software GeoGebra and are provided in the Virtual Mathematics Laboratory, developed by the Institute of Mathematics and Informatics of the Bulgarian Academy of Sciences…
The Impact of Using GeoGebra on Understanding Quadratic Functions and Equations for Tenth-Grade Students
Erëmirë R. Aliu, Shpëtim Rexhepi, and Egzona Iseni
Mother Teresa University, Skopje, North Macedonia
https://doi.org/10.53656/math2025-4-5-iug
Abstract. This study explores the impact of mathematical software, specifically GeoGebra, on tenth-grade students’ understanding of quadratic equations and functions. The research was conducted in two classes with similar academic levels: one class (X/3) was taught using traditional methods, while the other (X/4) integrated mathematical software into the learning process…
Bridging the Gap: A Pedagogical Tool for Teaching Mathematical Modeling with Spreadsheets
Dávid Paksi1), Márk Csóka1), Szilárd Svitek2)
1)Department of Informatics, J. Selye University – Komárno (Slovakia)
2)Department of Mathematics, J. Selye University – Komárno (Slovakia)
https://doi.org/10.53656/math2025-4-6-bgp
Abstract. The widespread use of information and communication technologies (ICT) offers new opportunities in many topics of mathematics education…
