# Approximating a blackboard with long-distance communication

From time to time I need to talk about mathematics with my advisor remotely. I would like to approximate writing on a blackboard together as closely as is reasonable. What are some technological options I have for doing this?

It would be nice to do something similar to http://www.youtube.com/watch?v=qbCZbP6_j48, though it would be much better if it can also be done in realtime.

Edit: This question was edited in order to meet the exacting demands of the MSE Community Standards. I have borrowed a suggested phrasing from here.

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Have a look at Tools for long-distance collaboration at MO, Online physics collaboration tools from physics.SE, and Mathematics via Distance Drawing from Category Theory mailing list. I've copied those links from comments to this question. – Martin Sleziak Mar 6 '13 at 5:53
Once I've heard a talk about this project: Media Spaces and Video in the Home at the Simon Fraser University, Canada. It featured a screen on which both parties were able to write text to be visible by both parties. Some screenshots may be seen on slides here. Maybe something like that could be applicable in your case? – Alexander Konovalov Sep 2 '13 at 19:52
A similar question was posted today on Ask Slashdot – Alexander Konovalov Feb 28 '15 at 19:58