You can discuss directly with your teacher via email or phone. Their contact details are in the left-hand bar of the lesson request. You can then decide with your teacher on the format of classes you would prefer.
There are number of possibilities:
Skype
Google Hangout
Zoom
Discord
Telephone
A number of tools allow you to exchange via audio and video, as well as to share your screen or your tablet.
662 tutors offer 3d modelling classes online