I taught two students Hebrew via skype. It was quite a challenge. I found it hard to respond to the students because I did not see their faces via Skype. It however forced me to ask better questions to find out if they understand well.
Another challenge was that it was not possible to show them something manually or to write on the blackboard. I had to find other ways to do this. But I think it was a good method overall, and the students enjoyed it. – Michal, Europe