School is back in session! 'Glee' returns to our television sets in just a few weeks, and before we know it, Rachel, Finn, Quinn, Kurt, Puck and more will be dancing and singing away just like old times.  The folks at FOX just dropped another Season 3 promo, and in this one, we get a sneak peek at one of the numbers that the glee club will put on when the lunch bell rings.

In this clip, we see the New Directions gallivanting around the lunch room, pouncing on tables and starting a dance train through the cafeteria, so it's obvious that we're in for a lunchtime number. What, you mean your high school wasn't like that?

Behind-the-scenes, with his classmates partying behind him, Chris Colfer spills that he's just as pumped up for this season as he always was for the first day of real school. "Coming back to Season 3 was exactly how it feels when you go back for a new year of school," he explains. "You see all of your old friends, you plan your outfit the night before, you buy, you know, pencils and pens. I don't need those, but you know, it's a mindset."

Cory Monteith adds, "I came back to work and it was just like I never left!" Curious about what to expect? Monteith says this season of 'Glee' will be even closer knit than the ones before it. "It feels like it's more about the core characters rather than the tribute episodes. It feels like it's a bit of a return to a more local feeling show."

While we love, love, loved the Britney-centric ep, we're pumped that we'll get more personal time with all of our favorite characters this season. 'Glee' returns to FOX on Sept. 20, so set those DVRs!

Watch the 'Glee' Season 3 Promo