For those of you that may not be familiar with Skype, their website features a series of tutorials that explain and demonstrate the features of Skype.  The various videos can be found in a section called Skype essentials.

The link to Skype essentials is here.

Be sure to also explore the features that are available with Skype mobile.  In the high school where I currently teach, virtually every student owns a smart phone.  I imagine that this will be the main access point to Skype by students and teachers as school districts continue to remove bans on personal electronic devices in classrooms.