Thank you for replying. So, some students use their cell phones to attend
class. While they have the printed lessons, they may not have the notebook
at classtime. But the same class lessons are visible on slides that I share
on the computer. It could be that their tablet or computer is not producing
sound, so they listen on the phone. I've requested that they turn off their
phones, but my guess is that those students can't me hear when they do
that. They may have a problem understanding they are to use either the
phone or the computer, as I am telling them in English, when class is
beginning English. I wrote here for help in troubleshooting how the echo
begins, so I can get in touch with their managers, who speak their
language, and can intervene in person to straighten out how they are
trying to attend class. Thanks for the videos, they were very helpful and
I'm forwarding the links to the school admin, who thinks the problem might
be the dual use of computer and phone.
