Particularly high learning successes have been achieved in the area of the general application of mathematics and working techniques. With regard to applying mathematics, many state that due to working on these modelling problems they understood how mathematics is applied and recognise its practical relevance, and its relevance to everyday life. Furthermore, some students say that, in fact, they are able to apply what they have learned in school. In the following, we exemplify the reasons by selected verbatim quotations of the students (in italics):