student hierarchy element
An individual entry under the main Students node. Student hierarchy elements include corporations, regions, divisions, organizations, and departments (or equivalent names per your configuration). Although individual students are also elements in the student hierarchy, their role is quite different from the other elements. Therefore, they are always referred to as students and are not included in the term "student hierarchy element."

The term may sometimes be shortened to "hierarchy element" when it is clear from the context that it applies to the student hierarchy.