The rules for playing Mystery Skype are simple: Students can only ask "yes" or "no" questions, and whichever class guesses the other's location first wins.
At Glasgow Middle School in Alexandria, Va., an eighth-grade class plays through video chat with another classroom.
"Are you north of Virginia?"
"Do you border an ocean?"
"Is your state one of the original 13 colonies?"
After about 45 minutes of back-and-forth, the students think they have it.
"Are you guys in Hilton, New York?" asks student Rawan Nasir.