Many people use Word or its equivalent to write essays these days. The problem with this is that many of us are now becoming confused as to the correct spellings, as a large majority of these word processors will, very helpfully, correct your spelling for you. Now if you are writing in American English, you are lucky, as those of us that write in British English can face problems.
This is why proofreading services are becoming invaluable. Does it have a z or an s? Does it have a u or an o? Time and time again organise is corrected to organize; realise to realize. If in doubt, always check a British English dictionary, the Oxford Online Dictionary is quite good and of course, proofread it. Another way to help this is by turning off your automatic spell-checker, and when you go through and spell-check your document, ignore the suggestions.
This is why proofreading services are becoming invaluable. Does it have a z or an s? Does it have a u or an o? Time and time again organise is corrected to organize; realise to realize. If in doubt, always check a British English dictionary, the Oxford Online Dictionary is quite good and of course, proofread it. Another way to help this is by turning off your automatic spell-checker, and when you go through and spell-check your document, ignore the suggestions.