This article elaborates the key aspects of the nature, roles, and implementation of models and modeling in STEM education. Regarding nature, although models and modeling differ between the STEM subjects there are also similarities, for example, concerning visual models and representations. The roles of models in the STEM subjects are dominated by conceptual models, while in technology/engineering manipulation of physical models is also important. Furthermore, common to all STEM subjects is the construction, evaluation, revision and (re-)use of models. Concerning the implementation of models and modeling in STEM education, evidence points to the relevance of including modeling in authentic engineering activities.