Teachers act as role models and through their activities are active co-designers of future generations. Independent thinking and taking responsible, sustainable actions form the basis for a vibrant society. Entrepreneurship skills can already be fostered in primary school children. This requires well-trained primary school teachers. The following text deals with the contents of "Entrepreneurship Education and Mathematics", which the curriculum provides for primary school children as well as for students of primary school education. In a case study the author describes the implementation of a course at the University College of Teacher Education Vienna/Krems as taught since 2015.