Bring in show music, please. This is SquawkPod and I'm CNBC producer Cameron Costa. On today's episode, school is starting and so is the debate over whether students benefit from having their phones in class.Yale lecturer Joanne Litman on one side. When the pocket calculator first came out, they were banned from schools cuz like kids will never ever learn how to do math. So my point being historically every time we have these new technologies there's a lot of fear about them and then ultimately we learn how ...