The data presented in this study gives a fairly unstructured picture of the mathematical organisations of the conceptual field of proportionality, as presented in textbooks and in the national tests. They also look different when it comes to how proportionality is handled in the textbooks and the national test for "Matematik A". The result shows that about every fourth task of the chapters and the national tests studied involved proportionality, but that there was a low variation in terms of types of tasks. Differences were observed between textbooks and national tests in terms of how solution techniques are recommended for different types of proportionality tasks. The two theoretical models of proportionality that were studied, ie. static and dynamic proportionality, are represented to approximately the same extent in both textbooks and national examinations. In geometry, it is often static proportionality, while in the field of functions it is common to use dynamic proportionality.