Wolfram Research
Wolfram Math World: Parabola
This is an excellent site on parabolas. Examples and formulas are given.
Texas Instruments
Texas Instruments: Polar Curves
Students use the TI InterActive! software to study Polar curves.
Texas Instruments
Texas Instruments: Exploring Polar Equations
In this activity, students will explore polar equations. They learn that by changing values a, b, and n, different polar curves can be generated.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Coordenadas Polares
Learn how to represent points and curves on the polar coordinate system.
Other
Old Dominion University: Calculus Animations W Mathcad
Explanations and animations of limits, slopes, derivatives, arc length, infinite series, conic sections, cycloids, parametric curves, polar curves, quadric surfaces, and more.