Although the reform in mathematics towards Realistic Mathematics Education resulted in a new generation of primary school textbook series, problem solving, in the meaning of solving non-routine mathematical problems, was hardly given any attention in these textbooks. At most the reform brought—to a certain degree–more complex realistic problems in which the children had to figure out, for instance, which of the several journal subscriptions is cheaper and what it costs to organize a birthday party. Puzzle-like problems, in which it is not directly clear from the beginning how to start with solving them, are scarcely found in the new textbooks. At best, one can come across these problems in additional materials for high achievers.