Watching, instructing, recording via webcam

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.

 

Thanks for the suggestions.
Do you know of a suggestion where I don't take control of their computer?
Just want to view them, and communicate with them.
Thanks again

 

Sounds llike gotomeeting.com google online meetings or online collaboration.

I know there is some way to record them, Solarwinds does online presentations & they offer a download of the show the next day, I just can't remember what they use.