As a Platform Manager:
  1. Navigate to Core.
  2. Select Users/Access > Profile.
  3. Click Manage Roles.
  4. Click the Teacher role.
  5. Click the Tasks link on the left.
  6. Click Edit in the upper right corner.
  7. Locate the "Assessment Section Detail" task and check this off.
  8. Click Save & Exit.

Before impersonating a teacher to verify this resolved the issue, you'll want to completely log out of the system to allow the access changes to update, then log back in and impersonate the user.