The Limitations of spellcheckers

• "In fact, you have to be quite good at spelling and reading in order to use a spellchecker effectively. Typically, if you have misspelled a word the spellchecker will offer a list of alternatives. Unless your initial attempt is reasonably close to the correct spelling, you are unlikely to be offered sensible alternatives, and, even if you are, you have to be able to make sense of what is on offer. You and your pupils also have to be aware of the limitations of spellcheckers. First, you may correctly spell a word but simply use the wrong one; for example, 'After I had eaten my super I went straight to bed.' A spellchecker will not spot that it should be 'supper' not 'super' (did you spot the mistake?). Second, the spellchecker does not recognize some perfectly acceptable words."
  (David Waugh and Wendy Jolliffe, English 5-11: A Guide for Teachers, 2nd ed