During class, you can manage student environments from the Instructor Console, including the following actions:
Suspend the environment
Delete the environment
Open the environment details page
Revert to the environment's original state (including any External Resources that were configured)
Extend the environment
Test connectivity or clear recent test results
To perform any of the above, from the Students tab at the left side of the Instructor Console, select the checkbox next to each of the student(s) you want to manage. Then click the more actions icon and select the desired action from the dropdown menu.
Note that the available actions may change, depending on the student(s) you've selected and the status of their class.