To simultaneously archive multiple students, use the bulk actions feature. Follow these steps:

1. Find the desired classroom in your 'My Classrooms' section.

2. Go to the Students tab.

3. Select all the applicable students by checking the corresponding boxes, then click the "Bulk Actions" button located above the student name column.

4. Choose "Archive" from the dropdown menu.

5. Select all the applicable students by checking the corresponding boxes, then click the "Bulk Actions" button located above the student name column.

6. Choose "Archive" from the dropdown menu.