@Robert Gentel,
this reminds me of the old joke...
A young Englishman asks his father, "Father, must a gentleman know Greek?"
"It is sufficient to have forgotten it."
Spelling is necessary, lest spell check let stand a word that means completely different than what the author intended -- could have serious legal and medical consequences.
In medicine the different between hyperthyroidism and hypothyroidism are night and day. Precision in language is required in a number of professions and therefore, spelling must be taught in the lower grades.