^ Good stuff right there.
I was fortunate, in that at the time I got taught the how-to of 'technical drawing' at c.11-13 (mid-80s), the tutor was actually an ex -Vauxhall Engineering draughtsman, very late-entry into his second career, who (1) really didn't much care for being told what he should teach , when it was an utterly-trivial subset of his experience, & he though t otherwise; and (2) consequently incorporated all sorts of stuff way-off-the core-curriculum, in terms of raw geometric construction with straight-edge+ compass* & enthused upon the how and why, drawings are ...composed, and what lies behind: why being able to convey information concisely in an accurate drawing matters, what in that drawing might matter - all the rest.
And did so in a way that, oh, made dull stuff like 'geometry' - actually a very real, interesting, thing to explore for it's own sake.
A rare gift.
and good golly - I count that an utter, memorable privilege; one that translated directly, a few years later via my appreciating the joy of generating by hand a really good drawing: to harness that taught ability to conjure-up a striking/wilfull (but accurate) projection: well that ..did well -enough along the way in bits & competitions, paid off my overdraft before I completed the second degree.
I can still do the method of generating an arbitrary-number of sides polygon, from a given facet; can picture it now. Only needs a compass, and straight edge. Later at Uni, a self-set idiocy of trying a 3-point perspective with a curved projection plane(s) - joy %) But I could attempt it - because someone who really cared, loved the geometry that lies behind, years earlier - had actually given me enough grounding in, and the raw inkling, to approach the task.
I've always appreciated that.