I'm confused on the difference between ailerons, flaps, and spoilers (incidentally, despise me on my Oxford comma and I'll shoot you down with my disdain </grammar-nerd>). Is it that flaps extend in and out, whilst ailerons and spoilers go up and down?
(Put another way, flaps don't flap and those which aren't flaps do flap?)
And why do flaps and ailerons sit where they do? Why do you have so many flaps and then an aileron and then repeat the pattern (or not?)?