Now Playing: 09-21-12 Marketplace

If any of you are a little Appled out this Friday, we can sympathize. But at $658 billion, Apple is the biggest company by stock value -- and now its shares are up more than 70 percent. So... is that a good thing? We've been hearing over the past few weeks from some of the thousands of teachers in this country who've been laid off. But what about the teachers that leave because they want to? Plus, we take a fish-eye view of what exactly makes a person middle class and, on its 50th birthday, we reflect on what about 2012 the Jetsons got right -- and where they dropped the hoverball.