Our main problems occurred with acoustic feedback, usually caused by cell phones.
We obtained our best results with the following setup:

N255 audio system ON

Handheld mic ON (use Headset mic if Handheld needed elsewhere)

Cart Computer ON and logged into Zoom

Cart Projector ON

Cart audio amp and speakers ON

Zoom Camera (cell phone), mounted on tripod, Muted in Zoom, with audio output minimized

Arrive at the classroom by 9am to do the above setup, as problems can arise such as
Microsoft deciding to upgrade the Windows operating system. It would be good to do a
test with one or more remote Zoom participants to ensure that all can see and hear.
It may be advisable to ask those remote members to sign on early for this test, so that
the testing does not interfere with the class functions.