SHARE-A-PALOOZA: The number of popular social media sites available on kids' mobile devices has exploded in recent years. The smartest apps now enable kids to chat with select groups of friends without being monitored by parents.
FUSTY FACEBOOK: Educators and kids say Facebook for teenagers has become a bit like a school-sanctioned prom, while apps such as Snapchat and Kik Messenger are the much cooler after-party.
IN THE DARK: Educators say they have seen everything from kids using mobile devices to circulate videos of school drug searches to male students sharing nude pictures of their girlfriends. Most parents, they say, have no idea.