Online Contest “Mathematics and Art” for the Development of Key Competencies

The online contest “Mathematics and Art” is organized by Tonediko since 2015. Participation in it creates the opportunity to develop almost all key competences. In addition, the competition is a means of promoting digital mathematical tools to a wide audience. In the paper, in the context of the research of the ability to use the provided dynamic files (directly or after modification), to create a composition on a given topic, the following will be presented: the competition regulation; main activities of the participants; opportunities to use the competition in IT lessons, fine arts, labor and equipment, mathematics and related teacher activities; results of passed competitions, some challenges and options to overcome them.