Watching, instructing, recording via webcam

[chrisj]

This is not an adult webcam related question. I'm new to webcamming. Please explain how I can accomplish the following:
Rather than travel to provide instruction face-to-face, I'm wondering how I could:
1. View a client via their webcam remotely.
2. Converse with them while they're on camera (I don't necceesarily need to be seen on my end).
3. At the end of the instruction, I or they, can record their actions.

Would I need to "dial" into them?
Would it be best to have a web page to view them live through?
Which way would produce the best quality recording?
Thanks.