- in Year Ninth (2021) / Issue Third, Author(s): Toni Chehlarova | DOI: 10.15547/PF.2021.015
A misconception related to the use of a non-existent figure in a task is presented. An opportunity for research work related to this problem is presen...
- in Year Ninth (2021) / Issue Fourth, Author(s): Toni Chehlarova, Mladen Valkov | DOI: 10.15547/PF.2021.021
...e for both PC and Android with mixed reality. The purpose of creating the game is to provide conditions for the development of digital and mathematica...
- in Year Ninth (2021) / Issue Fourth, Author(s): Neda Chehlarova | DOI: 10.15547/PF.2021.022
... of the training program with teachers and students of technical sciences are described. Some interesting editing options for users when working with ...
- in Year Twelfth (2024) / Issue Second, Author(s): Toni Chehlarova | DOI: 10.15547/PF.2024.010
...lts of solving such tasks by students in 3rd and in 4th grade in the online competition "VIVA Mathematics with a computer" organized by the Institute ...
- in Year Twelfth (2024) / Issue Third, Author(s): Neda Chehlarova | DOI: 10.15547/PF.2024.019
...ngular trapezoids, the made and printed 3D auxiliary models for them are given. Variants for using manipulatives made of EVA material to help mathemat...
- in Year Twelfth (2024) / Issue Fourth, Author(s): Toni Chehlarova, Neda Chehlarova | DOI: 10.15547/PF.2024.028
...are presented. Ideas for modifying some of them are discussed, with a view to improving the results. The computer models were developed with the dynam...
- in Year Thirteen (2025) / Issue First, Author(s): Neda Chehlarova, Koya Chehlarova, Natalia Gecheva | DOI: 10.15547/PF.2025.004
... educational experts from several cities in Bulgaria participated in them. All participants made their own original work on the topic "Jewelry with a ...
- in Year Thirteen (2025) / Issue Second, Author(s): Neda Chehlarova | DOI: 10.15547/PF.2025.015
... and 75% are presented. For this purpose, two series are used - with a circle and with a square. For each series, two options for presenting the corre...
- in Year Thirteen (2025) / Issue Fourth, Author(s): Toni Chehlarova, Neda Chehlarova | DOI: 10.15547/PF.2025.031
...ole are presented. To create them, fractions, decimal fractions and percentages were used as different ways of writing a part of a whole. Compositions...
- in Year Thirteen (2025) / Issue Fourth, Author(s): Toni Chehlarova, Ivan Petkov, Neda Chehlarova, Natalia Gecheva | DOI: 10.15547/PF.2025.025
...lts of participants from different age groups. For the implementation of the study, computer models were used, created with the dynamic software GeoGe...
