The Chain rule: What the heck is it? -- Calculus -- ThatTutorGuy.com 

In this video, I explain how to use the chain rule.
You can also see it on the full site: www.thattutorgu... along with other videos covering: The Power Rule (with Chain Rule), Derivatives of Roots & Radicals (with Chain Rule),Derivatives of Trig Functions (with Chain Rule), Derivatives of Exponentials (with Chain Rule),Derivatives of Natural Logs (with Chain Rule), and last but not least Hard Chain Rule Problems you won't find anywhere else.
But for this intro video it's just the basics on the chain rule.
I'm not going to throw you any major calculus theory about where the chain rule comes from. That will just confuse you, and besides, I don't really know where this thing comes from. Instead, in this video I'll show you how to spot whether a problem needs the chain rule or not, because that's the crucial first step in any derivative problem. In later videos we'll get into how to actually use the chain rule in each problem type.