n this chapter, we analyse the two most frequently used Dutch mathematics textbooks for upper secondary schools in order to determine to what extent the tasks in these textbooks meet the criteria we have set for genuine mathematical modelling: does a modelling task have a modelling purpose, and do the students have to perform characteristic modelling activities? The criterion of having a modelling purpose stems from a modelling course in tertiary education by the last two authors. For the characteristic modelling activities, we used the research of the first two authors. Only a very small percentage of the analysed tasks meets the criteria. So, there is hardly any genuine mathematical modelling in the two textbooks, although it is explicitly mentioned in the formal curriculum.