I joined two communities called "Technology in Education,"
https://plus.google.com/u/0/communities/106567026492773899034 so I could stay on top of the ever changing world of technology in education.
The second community I joined was called "Education,"
https://plus.google.com/u/0/communities/104562476528040665943 to stay current with a wide variety of issues facing education today.
I have also asked to join one called Educational Apps for Kids because it's virtually impossible for one person to stay on top all the new apps coming out daily. I thought it would be super helpful to have a team of professionals trying them out along with me, so I can cut through the bad and the overrated.