Reach learners wherever you and they are with a video conference.  If you have a web cam, microphone, and pretty good internet connection, you can easily have a video conference.  A screensharing tool might also be effective if you do not want to be on camera.

Google Hangouts is a free tool in the Google Suite.  Up to 10 participants as well as screen sharing; doc sharing with real time collaboration and vocal and video communication; and the "hangout" can be recorded and saved to YouTube.  Watch this 11 minute video to see what Google Hangouts can do:

Skype is a well-known method of video calling.  Now you can do video calls with up to 10 people, and it offers screen sharing.  Watch the video to see how easy it is to connect with other Skype users.