One of the oddest ironies in life, here in the UK, is that most of us have spelling, punctuation, phonics and grammar thrust at us over a period of 10 years, and yet many don't seem to realise the importance of accuracy in these areas, well after they have left school.
Many years ago, I did some KS2 English SATs marking. Tortuous meetings took place to discuss the minutiae of allocating marks for answers containing spelling errors, and the advice was to apply discretion. With this in mind, I set about marking 250 scripts, in which there was a question asking candidates to label the diagram of a whale! An arrow pointed towards its tongue and the students were to write their answers on the line by it! There were 23 variations on the spelling, but it was a tad unfortunate that several labelled it as a 'lung':
tonge tongne tounge touge tog toge tge tougugn
toungue tong taunge trng tongne tnge togue tug
tung tougnue taugue toong tog towng townge