It's not just smartphones, same thing can happen with any computer connected to the Internet, any computer NOT connected to the Internet (video games), a televi

It's not just smartphones, same thing can happen with any computer connected to the Internet, any computer NOT connected to the Internet (video games), a television, radio or even a Walkman (the last 3 typically not being an issue for the classroom for obvious reasons, but still potentially a tempting distraction to not do whatever you are supposed to be doing). Heck, even books / magazines can become that in some situations.