Use the telephone receiver like a microphone. You won't be able to hear the program through the receiver, so turn the receiver around and speak into the other end. You may need to turn the volume down on your monitor to prevent feedback. Others in the room should be quiet so they aren't heard during the program. Be patient and keep trying.
Some lessons utilize lots of phone interaction.
Others do not. If you don't get an opportunity to speak on-air one day, don't give up. Next time you might get lucky. Also, sometimes you may experience a busy signal on days when lots of schools are calling in. If this is a continual problem, please let us know.