Google+ is a social sharing tool, somewhat like Facebook. One of the differences is that you can group the connections you make into Circles and then share items only with certain circles. You can also separately view information posted by people in one of the circles. Hangouts allow live video communication – interactively (up to 10 people) or broadcast (can be seen by anyone that’s invited to view). These are rather new tools, and will take a bit of trial and error to use effectively.
For help in learning how to use these, here are some links:
- What is Google Plus? A Complete User Guide. (Videos and Blog)
- Free Google+ 6 week course (full content List)
- Hangouts: Free Video Conferencing and Google Apps for Educators