BBC learning English: American English and British English: spelling

American English and British English: spelling

Do you write in American English?
Or British English?
Try this spelling quiz.
How do you spell colour?
C-O-L-O-R
C-O-L-O-U-R
Hmm.
How do you spell favourite?
F-A-V-O-R-I-T-E
F-A-V-O-U-R-I-T-E
Ah!
And how do you spell flavour?
F-L-A-V-O-R
F-L-A-V-O-U-R
Did you notice that these words are spelt with O-R in American English?
And O-U-R in British English?
What other words are spelt differently in American English and British English?
Tell us in the comments.