Math Planet
Math Planet: Algebra 2: Standard Deviation and Normal Distribution
Gain an understanding of standard deviation and normal distribution by viewing an example and a video lesson.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Trig Tour
Take a tour of trigonometry using degrees or radians! Look for patterns in the values and on the graph when you change the value of theta. Compare the graphs of sine, cosine, and tangent.