A look at current educational standards and curricula shows that the use of digital media in mathematics instruction is increasingly being demanded and now goes far beyond the use of scientific calculators. Therefore, future teachers must already engage with digital media as part of their training. Accordingly, a teaching resource is offered here that systematically presents the opportunities and risks of using digital media in mathematics education, based on the functionalities of these media. The central aim is the development of media competence with regard to teaching and learning in the subject of mathematics. This teaching resource is based on tested and proven events within teacher education.