Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: The Derivative: The Derivative Function
Students learn about the derivative function. The tutorial explores the calculus concept through notes and examples.
Wolfram Research
Wolfram Math World: Derivative of a Function
Nice comprehensive site dealing with the derivative. The site contains derivatives of basic fundamental functions. The site goes on to give unexplained rules when taking simple derivatives. These rules have links for further explanations.
Math Open Reference
Math Open Reference: Power Functions
Gain an understanding of power functions with this helpful reference tool. Provides a detailed definition and examples that enhance further explanation. Includes links to related topics.