If you've ever watched "That 70s Show", that pretty much describes my HS life in the 70s. IIRC, my HS GPA was about 2.8, never studied, never did homework, did great on tests.
Started working as a carpenter for my buddy's dad, as a sophomore, had no intentions of, nor saw any need for going to college. Graduated in '79, just in time for the recession. Buddy's dad went from building 100 houses/year, to 17, then nothing. Did some other shit that was going nowhere, started taking some classes at the community college. Did an industrial maintenance mechanic certificate program, then an AAS in electronic controls, while working at a local fine dining restaurant. College GPA was 4.0. Started helping out the manager's boyfriend with some remodeling projects, and by the time I finished my AAS, would have taken a big pay cut to get started in electronics.
The industrial maintenance classes included stuff that helped me in the remodeling business, the electronics program, not so much. The most advanced stuff we learned there dealt with Intel's Z-80 8-bit microprocessor. But I've never believed there was such a thing as useless knowledge, I even took calculus just for the fun of it