In AOL TV's continuing countdown of the best TV shows of each decade, we're back to break down the 1970s, a decade when the cop dramas were less gritty, the families were close-knit and the sitcoms were sprinkled with serious social commentary.

Our list of the best shows of the '70s features many of the best shows of all time (here's looking at you, 'Mary Tyler Moore Show,' 'M*A*S*H' and 'Taxi'). Take a gander and let us know if you agree.

Some say the most important job in the world is that of a teacher. And, really, we've all been placed under the tutelage of someone who was literally paid to provide education. But yet, so often, kids find themselves inspired by - and often in worship of - these individuals, young and old alike, who can play an integral role in shaping one's childhood and, some might argue, the rest of their lives.

Of course, that isn't always the case. Teachers can also be awful monsters whom we never forget for their ability to patronize, degrade, or humiliate us, often leaving one wondering if the man or woman in question took the job merely to torture students. This, naturally, can lead a kid to fantasize about how cool it would be to fall under the instruction of one of the following actors who, despite likely not possessing any type of teaching certification in real life, would probably be a blast to spend 40-or-so minutes on a daily basis.

Beverly Hills, 90210 ... 21 Jump Street ... The Facts of Life ... see where they rank on our list.

The bad news? Summer's almost over and it's nearly time for school again.

The good news? We've got just the thing to ease you into back-to-school mode: Our countdown of TV's 21 best school shows ever.

So sharpen your No. 2 pencil and dive in to see which series just make the grade and which ones are at the top of the class.

Whatever happened to Horshack, Boom Boom and the other Sweathogs?

Before John Travolta was a big-time movie star, he was underachieving Sweathog Vinnie Barbarino in the hit sitcom 'Welcome Back, Kotter' (1975-79).

With a movie in the works starring Ice Cube as Mr. K., it's a perfect time to welcome back the original 'Kotter' crew and see where they've been since they dropped out of prime time.

Read on to see who's still acting, who's switched to professional poker... and who threw down on 'Celebrity Boxing.'

While channel-surfing on my little office TV last week around 1 a.m., looking for something to keep me company, I stumbled across an episode of Voyage to the Bottom of the Sea (star Richard Basehart, pictured), followed by Combat!.

"What is this channel that plays all these old shows I remember as a kid?" I asked the TV Gods.

"It's AmericanLife," they replied. "They feature classic family shows aimed at Baby Boomers -- shows like Remington Steele, The Courtship of Eddie's Father, Lost in Space, and Welcome Back, Kotter."

Ok, the TV Gods didn't really say that. I looked it up on the AmericanLife Web site, not to be confused with Showtime's This American Life, the fab documentary series hosted by Ira Glass.