A History of the Calculus [ Teens/Mature Teens ] - The main ideas of calculus developed over a very long period of time. Read about some of the mathematicians who contributed to this field of mathematics. http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/The_rise_of_calculus.html

Algebra and Calculus Sketches [ Teens/Mature Teens ] - For calculus, gives the tangent line problem and its solution. http://www.mathforum.org/sum95/ruth/sketches/algcalc.sketches.html

Automatic Calculus Solutions [ Mature Teens ] - Check calculus homework. Enter a function and click for a step-by-step derivative or integral with each step explained. http://www.calc101.com/

Calculus Made Easier [ Teens/Mature Teens ] - An introduction to the basic concepts. The derivative and integral are explained. Resource links included. http://www.wtv-zone.com/Angelaruth49/Calculus.html

Calculus-Help.com [ Mature Teens ] - Features a new practice calculus problem every week with complete solutions. Includes an archive of prior weeks' problems and solutions. http://www.calculus-help.com/

Karl's Calculus Tutor [ Kids/Teens ] - Introductory information on counting numbers, integers, limits, and derivatives. http://www.karlscalculus.org/

The History Of Calculus [ Teens/Mature Teens ] - Interested in how Calculus became what it is today? This site offers a historical account of the progression of the study from its infancy to its present state. http://www-gap.dcs.st-and.ac.uk/~history/HistTopics/The_rise_of_calculus.html

Visual Calculus [ Mature Teens ] - Short descriptions and examples for limits, derivatives, and integrals. Various plug-ins are needed to view some of the pages. http://archives.math.utk.edu/visual.calculus/