Teenage hangups: the drastic plans to keep high schoolers off their phones

Soon more than 1,000 schools nationwide will be using Yondr, a pouch that students lock their phones in during class

Put your cellphone away. Stop texting. Stop using the camera as a mirror. Stop looking at Instagram. They're the familiar commands of teachers and educators in the age of the smartphone.

Most teenagers today have grown up never knowing a world without smartphones, with the Pew Research Center reporting that 95% of all teens currently have access or own a smartphone, and 45% are online almost constantly. That leaves educators the daunting challenge of teaching those whose attentions are - at least partially - attached to the devices in their pockets.