[astangl]

In our high school physics class in early 80s, the teacher didn't care for calculators, so you'd have to do your calculations by hand, or learn to use a slide rule. I learned to use a slide rule, along with a buddy. I don't remember others in the class using slide rules, but looking back now, I have a hard time believing everybody else used pencil & paper. So there were probably others.

I think that teacher didn't retire for another 20 years, so he may have had kids in the 21st century still learning to use slide rules for his class.