Categorization of tasks with interdisciplinary content in selected textbooks for lower-secondary school level

This is a pilot study of a project aimed at preparing an integrated STEM curriculum in the Czech Republic. To create a categorization of tasks that would help implement the STEM concept, we analysed selected curricular documents and textbooks. We found the topic that was most often reflected in individual STEM subjects in curricular documents, and then we analysed qualitatively tasks in biology, geography, chemistry, physics, technical education, and mathematics textbooks according to this topic. On the basis of open coding and constant comparison, we have got a categorization of tasks reflecting the rendition, the level of interdisciplinarity, and the degree of interconnection of educational contents. Illustrative tasks are given to all the relevant categories.