I've done a lot of programming at the white board and it involved a lot of drawing. And I suck at drawing. But I was able to get my ideas across to others.

This might also be of interest: http://www.agilemodeling.com/essays/communication.htm.

You might also want to consider that people learn and communicate best in different ways:

* Visual Learning - https://en.wikipedia.org/wiki/Visual_learning * Auditory Learning - https://en.wikipedia.org/wiki/Auditory_learning * Kinesthetic Learning - https://en.wikipedia.org/wiki/Kinesthetic_learning

and others.