Family business is land surveying, so when I wasn't getting bossed around as a kid on the field crew, I was taught how to draw up plot plans, subdivisions, etc early on back when it was all pencil and tracing paper (before CAD). My grandfather decided toi take full advantage of the fact that mechanical drawing was a rotational class we had when I was in middle school (along with cooking, sewing and wood shop). I took it as an easy elective in high school for 2 yrs. teacher said it was refreshing to have a student who actually knew WTF they were doing for once lol.