Here are the links from my presentation on Desmos at the December, 2014 AMAPS meeting.  You can find more of my work with Desmos here.

Desmos — the free online graphing calculator

Mean Value Theorem

Rolle’s Theorem and the MVT

MVT for Integrals

Circumcircle

Particles on Ellipses

Two Vectors Span the Plane

Demonstration of Vector Derivatives

Maximizing the Area of an Inscribed Rectangle

Distance from a Point to a Graph

Exploring Correlation and Regression

Andrew Wille’s student projects