Riemann Sum Site
Interesting Riemann sum pages:
http://www.slu.edu/classes/maymk/Riemann/Riemann.html
Provides you with an interactive Riemann Sum demonstrator courtesy of the Math Department at Saint Louis University. You can change the function to one of your choosing or use a number of preset functions.
Be sure to note over/underestimation using a left or right hand estimate versus whether the function is increasing or decreasing in a certain range. (This question frequently comes up on the AP exam to test your understanding of the Riemann concept.)
