Istanbul Kültür University Department of Mathematics and Computer Sciences, "1 Decembrie 1918", in collaboration with Alba Iulia University (Romania) and Preschool Teacher Training and Medical College in Vrsac (Serbia), within the scope of ERASMUS BIP (Blended Intensive Programmes) between 23-27 October 2023 An international event called "Mathematical Performance Using Teaching-Assistant Learning Tools" was organized for undergraduate students. Mathematics and learning performance was given by Assoc. Prof. Thomas E. Hunt (Derby University - England) to 24 Erasmus students who visited our University within the scope of the event; Basic components of number sense and how early number sense can be developed by Prof. Dr. Sinan Olkun (Ankara University - Türkiye); Head of the Department of Mathematics and Computer Sciences, Prof. Dr. Mert Çağlar (Istanbul Kültür University, Türkiye), gave theoretical and practical lessons on the Turkish education system, especially the development of mathematics education and the application of auxiliary teaching tools. Additionally, Kültür College was visited; Students were informed about the methods followed for mathematics education, mathematics course contents and applications.