IIRC, my ‘General Business’ class was in the 10th grade. That would have been the 1965-66 school year. I agree it was one of the more valuable things I learned in 16 years of formal schooling.
Yes, and I continued that as my curriculum in high school, which meant bookkeeping, typing, office correspondence, and the like, with the exception being Russian language, instead of shorthand!
(In 1968, I had a dream we would be doing business with the Russians, and I wanted to be ready for that.)