Development of Interactive Learning Media for Congruence Material as a Preparation Means for Mathematics Olympiads

The National Science Olympiad (OSN) is one of the prestigious Olympic competitions in Indonesia. However, certain educational institutions experience many obstacles in preparation, especially in mathematics. Some of these obstacles include the fact that many academic institutions still do not facilitate teachers to focus on teaching mathematics Olympiad material. This condition requires teachers to be extra in preparing material and practice questions for mathematics olympiads. The "MathSyik" application is equipped with material presented in videos, practice questions, and quizzes that are enhanced with features for awarding points and speed of time. This research uses RD methods and 4D models. After going through the development stage, the "MathSyik" learning media was then tested for validity by two material experts and two media experts. Based on the validity test, a score of 95.5% was obtained by media experts and a score of 80.63% by material experts, both of which were declared very valid and valid. Because it is declared very valid, the learning media "MathSyik" can be used as preparation material for mathematics olympiads on congruence material.