Navigate to the Participation tab
Inside the poll, click on the three dots located on the top right corner of your screen
3. Select the 're-open' option
4. Make sure you set a re-open 'Duration'
Duration can be set to seconds, minutes, hours, or days
5. You can re-open content for a single student or all of them by clicking on the right square next to the name
This is how the re-open functionality work:
If a student has already submitted an answer, and there's a re-open opportunity, their original submission will not be deleted unless the student makes a new submission.
If a student has not submitted an answer, they'll have the opportunity to make a submission within the re-open duration set during editing.