Do schools even teach paper/pencil/ruler/compass any more? I get not teaching slide rule, but using a straight edge and compass is even older than slide rule. I actually enjoyed drawing things like this, but I know that's not something all do. I can easily see where this is something lost with CAD and other graphing apps.

Yes, but they use a "non-collapsing" compass that can transmit distances without constructing them, not Euclid's compass (which can be used to transmit distances, with more work).

http://euclidea.xyz

I like how you responded to a question about not using apps with an app.

i have this mechanical drafting book - it's fucking amazing. Goes from simple euclidean type stuff - all the way to full parts, amazing patterns and so on: https://www.amazon.com.au/Popular-Mechanics-Art-Mechanical-D...

You can try a bit of burnt wood and a cave wall.

You can use a stick and some dirt, as long as no Macedonian kings block your sun

wow, apparently this comment touched a nerve

That's important, I think... not just historically, but to assist in concept formation. Although, replace 'ruler' with 'straightedge', to emphasize that there is no measuring.

I choose ruler over straightedge because that is what people will have more commonly and you can always ignore the scale.