http://www.wyzant.com/resources/lessons/math/calculus/introduction/history_of_calculus

http://www.wyzant.com/resources/lessons/math/calculus/introduction/applications_of_calculus

http://www.biography.com/people/isaac-newton-9422656#related-video-gallery

http://www.sscc.edu/home/jdavidso/mathadvising/aboutcalculus.html

http://www.uiowa.edu/~c22m025c/history.html

http://www.math.vanderbilt.edu/~schectex/courses/whystudy.html