Learning to farm with...
AD carries are notorious for needing farm more than nearly any other role in the game. They end up in a lane with another player, meaning they level slower than the other solo lane roles and even the jungler, but they are well protected to get plenty of farm so they can hit their item power spikes. Some AD carries are nearly fully item dependant, as their kits simply provide them huge steroids to boost the power of their items, such as Vayne's Silver Bolts and ultimate. Corki however DOES scale well with levels, and always turns up competitively due to his nearly unrivalled mid-game power-spike, but he tends to fall off in damage late game. This is because he has no conventional steroids, but is does a lot of ability damage through his rockets and Q, phosphorous bomb. However, his ability reliance also makes him amazingly easy to farm on, but not quite as easy as Sivir, who just hits W and last hits EVERY minion in the wave. This makes him great for learning how to clear waves with ability combos, while still building AD to make last hitting a bit easier than on a full AP carry.