here you go fedi.

[starcross@mk.absturztau.be]

@kirakira@furry.engineer you know you were in for an interesting math lesson when they pulled this thing and the clear sheets with the dry erase markers
the math specialist comes in and is moving around all sorts of shapes and stuff

[dragonfi@social.jsteuernagel.de]

@kirakira This brings back memories.

[cve@sisyphus.gay]

@kirakira@furry.engineer I played Go on one of those at 38c3 <img class=“not-responsive emoji” src=“https://sisyphus.gay/emoji/neofox/neofox_blep.png” title=“:neofox_blep:” />

[tompearce49@mastodon.scot]

@kirakira Hello old friend. Almost as old as the epidiascope we had in my secondary school. And now I feel REALLY old!

[snapsjaw@critters.gay]

@kirakira@furry.engineer yippee! !! ​​

[eddidoums@yiff.life]

@kirakira @anteumbra I think that someone using an overhead projector to diagram out their polycule would be peak Mastodon.

[cjacobs73_perpetual_chrysalis@thistlenfern.org]

@kirakira This is a welcome blast from the past.

[charlotte@akko.chir.rs]

@kirakira thank you for your offering of polylux

[baralheia@dragonchat.org]

@kirakira W A O W

[eragon@pl.eragon.re]

@kirakira@furry.engineer awwww

I have the lense of one of those in my room

[rinavolpina@rubber.social]

@kirakira heck yeah!! OHP!!!!!

[furrybeta@shark.community]

@kirakira As I crumble into dust, I shout “What about mimeograph machines and their “smell it to get high” copies?”

[kirakira@furry.engineer]

wtf i come back and 100 of you have enjoyed the Technology. thank you for enjoying this Technology

[qualia@floofy.tech]

@kirakira hooting adn FUCKIGN hollerig LOOK AT IT GO

[robotdiver@starlite.rodeo]

@kirakira

Serious flashbacks to my grade 11 math/calculus class and our teacher's hand written lesson guides with letters flaked off that you could not read to save your life. Asking for clarification led to being labeled a problem student. I taught myself math that year.

[jiub@not.an.evilcyberhacker.net]

@perry@mk.absturztau.be @kirakira@furry.engineer they're called overhead projector in english as well (at least in the US)

[dicenbuttons@mastodon.social]

@jcm @kirakira

I graduated highschool in 2007, college a few years later. These things were ubiquitous throughout that experience.

... are they no longer in use? Is it all computers now?

Wild.

[alicemcalicepants@ohai.social]

@kirakira I feel like I'm about to belt out Pure Jesus Anthems with 300 other under-11s.

Still bummed that I never got to be the helper moving their finger down the lines.

[themnwolf@furry.engineer]

@kirakira I was in the really special math class. We had the LCD display that goes on top of that thing that shows a ti graphing calculator screen on the projection.

[jcm@wafrn.jcm.re]

@dicenbuttons@mastodon.social @kirakira@furry.engineer

At my university (I study computer engineering, other students might have a different experience) it is mostly either computers (PowerPoint/LaTeX Beamer slides; usually for most computer science stuff) or blackboard only (math stuff).

The course using these things still was about models for information processing in the brain and mostly used backboard with a few dias shown containing graphs, complex sketches, pictures, etc. presented using the overhead projector.

I personally enjoy courses mostly done with blackboard, because it typically limits the professor's talking speed to their writing speed and also allows me to write almost everything down.
I've had a course using 180+ slides for each 90-minute lecture. Not even those "I made an animation by making thing appear slide-by-slide", no, it was 180 slides of mostly new content. No chance to write anything down or even fully grasp one slide before the next one is shown…