My 4th grade team is about to embark on their first Mystery Skype. If you are not familiar with Mystery Skype, I will tell you that it is an excellent way for students to connect with learners in other classrooms. Basically, a Mystery Skype is when you use Skype (or Google Hangouts or whatever videoconferencing tool is available to you) to contact another classroom and neither class knows where the other is located. Students take turns asking the kids in the other class yes or no questions to try and figure out where the other class is located. Mystery Skypes are great fun, involve the whole class, and get students working collaboratively and thinking critically. Although there is some prep involved, especially before the first time you do it, as you explain to the students what they will be doing, the actual call goes fairly quickly, about 20-30 minutes.
Once you have the system down, less prep is needed. Students soon learn what to ask to pinpoint the location of the other class. They will also learn how to use geographic vocabulary, how to work with students of other cultures, and their collaboration skills will improve.
Here is a very brief list of some Mystery Skype resources. There are many more out there. I also highly recommend Twitter if you are looking for a classroom to connect with.
When are we gonna do that again? by Craig Badura
4th grade Mystery Skype sign up page
So you want to do Mystery Skype? by Pernille Ripp
Skype jobs video and chart
Edudemic: 5 amazing ways to collaborate with another class
Mystery Skype page from skype.com
One great hint I learned from Holly Clark at CUE Rockstar Solana Beach: When doing a Mystery Skype, make sure your classroom flag is not visible to the other class. It narrows down the country pretty quickly!