An offline assessment represents a traditional assessment such as a paper-based test or reading a book. There is no online submission for this kind of assessment, and the instructor is expected to enter the grades for each learner based on the results of the offline work.
Since there is no online submission for this kind of assessment, there is no option for setting the maximum number of submissions or enabling late submissions.
The learner sees the message 'Click 'Completed' to indicate that you have completed the assessment. This will also remove it from your due list. When the learner clicks the button, the offline assessment is flagged as being completed.
Instructors can choose to disable self-completion for offline assessments. If you want to add an offline assessment with self-completion disabled, visit the Options tab when adding the assessment and click "Disable self-completion".
If self-completion is disabled, the "Your submission" section isn't displayed and the learner can't mark the assessment as completed.
To grade a learner's submission, click their icon in the 'To grade' tab.