I've been looking for this shit for ages. It's a manga

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I've been looking for this shit for ages. It's a manga I read in middle school and I can't remember a lot of details, but it involved a few young scientist girls in a school together where you had to build some sort of science gizmo or robot or something to get good grades, and bad kids would be sent to this sort of factory or windmill or some place and they were "never heard from again." What I remember the most clearly is that the teachers somehow never aged because of some kind of steam technology where their skin was almost like a sort of patchwork and their body parts were sewn on, and the only other thing I can remember is that the protagonist was a girl who's only good creation was this lizard or dinosaur pet she had, and on one of her tests she destroyed some shit and got sent to this evil factory or whatever. Would appreciate some help, been turned down other places.

> Pic semi-related, obviously it's not Nichijou but you get the idea