How to enter mass evaluation of HW check (OK/Not done/In progress) in the application?

In the mobile application, the teacher can quickly enter the homework status, to check if the students have done their homework or not.

Click on the HW/exams tile, select a specific HW, and click on the "Edit result states of students" option.
Click on the student to set the elaboration status to "OK". If you click again, the status will be set to "Not done". Save the changes.

To set a different state, hold your finger on the student name and select form the list of possible states.