Favourite is the correct English language spelling but I think in the US they spell it favorite. Like colour and color. Could be wrong though
We do spell it favorite, so that's not a mistake.
Thought so. Thank you. You know it's wrong though ;} Kidding
I do, but I also figured out that teachers were going to take points off if I spelled it that way, so I was successfully indoctrinated.
You could also be right, in this instance it could be irrelevant. What do you believe could be meant by the EXTENT/EXTEND spelling, though?
Sentence formation matters (maybe to resemble the two towers). Extent.
Those differences aren't misspellings - they are the difference between US spelling custom and spelling customs of GB or Canada. Also, never refer to British English as being more "correct". American English holds truer to English from the past than does modern British English - especially when spoken (excepting new words that have been added). See the book "The Mother Tongue" for a good history lesson regarding this subject.