Q: How faculty integrate technology in teaching? Could you share some examples?

A: I'd like to point to my colleagues:  Sustainability and success: Teaching with technology | ASU News

Q: I am going out of country. What is the best way to communicate with my students if they need Screen sharing?

A: Skype is offering free communication, just sign in:

http://www.skype.com/intl/en-us/get-skype/

http://www.skype.com/intl/en-us/features/allfeatures/screen-sharing/