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.

• Remember Earth 2? It was a short-lived sci-fi series on NBC in 1994 that starred Debrah Farentino, Antonio Sabato, Jr, Clancy Brown, and Rebecca Gayheart. It was actually a pretty good show, rather unpredictable and engrossing, and I'm happy to see that the complete series is being released on July 19. 
• Welcome back, Welcome Back, Kotter! (Admit it, you knew that line was coming.) Warner is releasing a set later this year. Alas, Sweathoggians (Sweataholics? Sweathoggers?), it's only a "Best Of" and not the first season set.
• This is truly bizarre: Universal has been pretty slow in releasing their TV shows on DVD (and when they do it's hit or miss as to whether there are any extras, photos, etc), but what do they have coming July 19? Cleopatra 2525. Wow, remember this show? It was the syndicated action series from Sam Raimi (Hercules, Xena, the Spiderman flicks and Evil Dead trilogy) about a dancer named Cleopatra who was frozen in present day and revived in the year 2525 to fight the bad guys with two other smokin' chicks dedicated women who swore to protect the world. It was rather terrible, but good if you found yourself in the right mood at one in the morning or a sleepy Sunday afternoon.
• And don't forget that season one of both Lost and Desperate Housewives come out in September!