Of course, 'participation' also springs to mind; and it's more quantifiable and measurable than engagement. But since participation can sometimes to be construed to mean just showing up and going through the motions, engagement may be the more appropriate term because the element of engagement is definitely included in the German term.

Compare with this:

"Academic Identification
Students can be identified as “at risk” by Lecturers in Weeks 3, 6 and 9, after census date and their first assessments

(Annexure 1: Flowchart –Student at Risk Process).

Identification is based on:
•low-level regular attendance of classes;
•limited engagement in class activities;
..."
https://aih.nsw.edu.au/wp-content/uploads/2020/10/ACAHE22-St...