Given the title of the episode, it is possible that it went into too sensitive of a topic such as mental disorders, then again, every episode title did have an "Ed" pun to it, much of the time having nothing to do with the plot of the episode, so anything's possible. I'm just going to go with the "special education class" idea because it makes the most sense.
Cracks was a very interesting short, though it was also a rather surreal one. Whenever I hear about it, it reminds me a lot of those creepypastas that are about obscure kids shows that allegedly aired decades ago and are now lost or banned for whatever reason. It does make me wonder if any popular creepypastas that involve this kind of material like "Candle Cove" were in any way inspired by Cracks.
I mean, it's definitely very memorable, especially the monster at the end of the short which probably startled many kids. I may have not seen Cracks when it originally aired (I wasn't even born until the mid-90's), but there were definitely things from my childhood that did startle me that were arguably similar. Cracks didn't startle me when I finally did see it about two years after it was found (and was one of the things that encouraged me to join the Lost Media Wiki), though that's probably because I'm much older now and aren't startled by such things.
When I was in middle school, I wanted to learn Japanese because I was heavily into anime and manga at the time. I only learned a few basic words, but struggled at the learning software.
When I was offered a second language course in school, I wanted to learn Japanese and felt like I would have a better experience, but they didn't offer Japanese, only Spanish, French, and German. I ended up choosing Spanish and I hated it, namely because I wanted to learn Japanese and had no interest in learning Spanish, plus the teacher was overly restrictive and failed you if you even dared as to use words that weren't even taught in the class (shouldn't you get extra credit for learning Spanish words outside of class?). Once I reached senior year of high school, I gave up on the Spanish course, but then they offered a Japanese course, but my mom told me not to take it due to my hard time in Spanish class and instead said that I should find a way to learn a language on my own. Since then my interest in anime and manga waned and my interest in learning Japanese faded along with it.
Today I barely know any languages other than English and have no idea what language to learn. Doesn't help that most of the people I know live in predominately English speaking countries and only speak English.
Don't think anyone's talked about these animated features before, but it's a really interesting history lesson about animation. Given this was made with cutout animation and was political satire, it was pretty much South Park before South Park was a thing.
My favorite piece of lost media that's been found: The Electric Piper, Cracks My favorite piece of lost media that's still lost: Doraemon '73, Pinwheel (all of it, not just the Clockman), Agent Crush... there's just too many interesting pieces of lost media that fascinate me.
Disney Channel isn't exactly good at keeping track of DVD releases, so a lot of early Disney Channel shows, even the ones that were popular, are probably lost.
There is a "lost audio" category on the wiki, since a lot of the time, dubs are just different audio tracks, unless you're counting about heavily butchered dubs like those of 4Kids, but that's another topic entirely.
Unless little to no footage of the dub exists, then it's not lost media, because lost media is only lost if it's difficult or near impossible to find.
I was just reading the page for this earlier today, and it kind of caught my attention given it's seemingly unique nature, since I am rather fascinated by the old British "supermarionation" shows like Thunderbirds. I dunno what happened to it, perhaps it ended up being like Foodfight or Freaky Flickers and the master tapes were stolen, or something involving legal problems such as distribution issues.
The name seems familiar, though I probably never watched it since I've always been someone more for Nick's animated programming and only watched the live-action shows if there was nothing else on.
To me, cancelled media is lost media if enough of the product was implied to be made (like a few minutes of footage or gameplay), or if it was completely made but was never released for whatever reason (like Earthbound Beginnings before it was actually found). If it was never made at all, then it's technically not lost media.
I found this site through Bedhead Bernie's videos on lost media (specifically his "A Day With Spongebob Squarepants" videos and his recent video on "Cracks"), which I found him through Pan Pizza's Tumblr page. Since then I've taken an interest in lost media, especially since I'm someone who's heavily into really obscure stuff.