Now that you have completed a chapter filled with derivative rules, you are about to embark on another derivative chapter, this one is devoted to a single rule: the Chain Rule.  This rule certainly deserves its own chapter, but you will also becomes familiar with the variety of applications that are accessible once you know how to apply it.
(Taken from an excerpt in the fifth edition of the Finney, Demana, Waits, Kennedy, and Bressoud textbook Calculus - Graphical, Numerical, Algebraic.)