Having just seen again, after a decade or so, Night of the Comet, it strikes me as clever and well-worked-out for the most part, and while usually given the credit it deserves by most reviewers, it's an easy film to underestimate, in its utter lack of pretense. And while there are acknowledged classics involving such matters as teens and near-teens dealing with very grave peril indeed (such as, obviously, Lord of the Flies, or, with lesser crime involved, The 400 Blows), Night of the Comet is one of a number that might be slighted in one's memory, particularly if one didn't catch them when maximally willing to give them their best shot, i.e. when a teen one's self.
And it reminds me of others nearly drowned in the sea of slashers and similar drek (such as the "torture porn" children of the slashers), such as The Little Girl Who Lived Down the Lane, featuring the adolescent Jodie Foster as a prodigy who is doing quite well living a fairly isolated life with her father, whom no one ever seems to see. Sentiment akin to nostalgia will probably always allow me to forgive the rougher edges of this film, also clever and well-cast, with Martin Sheen as relentlessly creepish as he was in Badlands (a film which almost makes the cut for this list).
The opposite of prodigies populate the much later River's Edge, loosely based on the actual experiences of some small-town teens who covered for the murder of one of their friends by another. Perhaps the best single example to offer to those who enjoy insisting Keanu Reeves can't act, and the rest of the cast is impressive.
Meanwhile, even more blatantly satirical, a touchstone for many fans from its debut in the 1980s, is Heathers, which takes a few easy choices but also mocks the John Hughes sort of teen-stroking flick among many other targets.
Another mockery of most of the other most popular teen films of the previous decade is Not Another Teen Movie, which is apparently not currently being pirated on the web-clip services (this post being an exercise in part in demonstrating how many are), due to Universal keeping a close eye on this film, which was originally released by Columbia. This could be the choice among these ten that would generate the most disapproval, anyway, particularly from those folks who would insist this film is crude hack while describing the inane Scream films as deft.
Meanwhile, April Fool's Day (1986) is one of several films starring Deborah Foreman, best remembered for Valley Girl, which fall solidly into the Better Than You'd Expect Category. A witty reworking of the And Then There Were None... formula, and marketed incorrectly as a slasher, this still suggests more of a kinship with RKO/Lewton Unit The Seventh Victim than probably should be.
The Chocolate War was a credible adaptation of Robert Cormier's YA novel about the rise of fascism in the microcosm of a private school, but while the novel remains one of the more popular in its class, the film seems to have been ostracized. (It probably doesn't help that, as with many of the other films cited above, its releasing studio is long dead.)
Massacre at Central High is a low-budget 1970s film with some remarkably inappropriate music, and it's been decades since I've seen it (cut for television), but I remember it as an eventually persuasive study of young psychosis (played by actors rather too blatantly superannuated, as too often the case). A legitimate YT posting, apparently, perhaps as it's in the public domain.
And two films of fairly recent release to round out the selections here, both more the focus of somewhat scandalized chatter rather than much close analysis, but both devoted to observations about sexual politics, exploitation, and no little challenging the blithe attempts of too many teen oriented films to highlight women, very much including young women, as still the Other...Deadgirl and Teeth. Neither a perfect film by any means, but both unafraid of controversy and more complex than they were often given credit for on first release...