I've long suspected that K-12 math was designed as vocational training for the job "computer", which was a common job in the defense industry prior to its repla

I've long suspected that K-12 math was designed as vocational training for the job "computer", which was a common job in the defense industry prior to its replacement by electromechanical and digital computers. For example, the computation of the firing tape measures for US artillery in WW2 would require enormous, precise calculations of just the sort that one practices in K-12 mathematics.