Problem orientation in mathematics The Fermi tasks, which were named after the talented nuclear physicist Enrico Fermi, have become increasingly popular in recent times. Although they do not seem to have much to do with mathematics at first, they are more concerned with estimates, model calculations and problem solving. But in everyday life this problem-oriented approach is extremely useful! Working independently with Fermi tasks The more accurate estimates based on researched data are, the more useful the final result is. Fermi mastered this approach intuitively. Her students are gently introduced to the approach through cooperative methods and guidance tasks. Tips will help them solve the subsequent Fermi tasks, making it easier for them to work independently. Differentiation with the help of Fermi-Auf.