Author, Darcy Pattison has posted a list of 24 Tips & Settings for Skype Author Visits at her blog, Fiction Notes. Most districts have this capability now.
Her tips are WELL WORTH your time. She is so smart to consider lighting, appearance, props and the setting in general. Especially important... is her tip to LOOK AT THE CAMERA not the computer screen.
These tips are excellent for anyone making use of this technology in any capacity. Go read it now.