I employ Desmos, the free, web-based graphing calculator, in a variety of ways: as a presentation platform, as a exploration environment, and as a tool for students to build with mathematics.

I have presented on Desmos many times, to teachers, administrators, and students. You can read about one such workshop here.

And this document is part of my standard *Introduction to Desmos* workshop: Introduction to Desmos

**Demonstrations**

Here is a short list of some of the demonstrations I have created using Desmos.

Distance from a point to a graph A nice visualization of the distance from a point to a graph.

Maximize the area of this rectangle! A simple, engaging introduction to optimization.

The locus of points equidistant to a fixed point and a line segment A visualization inspired by a James Tanton problem.

Distance from to the point (b,0) The interactive that accompanies this neat little result.

Exploring Correlation and Regression An interactive tool for exploring some elementary concepts in statistics.

Two Vectors Span the Plane A visualization of linear independence.

Vector Derivatives A demonstration of vector-valued functions and their derivatives

Circumcircle The perpendicular bisectors of the sides of a triangle are concurrent at the circumcenter

When Technology Fails! The interactive that spawned this fascinating conversation, and this talk.

PDFs and CDFs A tool for building graphs of distribution and density functions.

MVT and Rolle’s Theorem A demonstration of the connection between the Mean Value Theorem and Rolle’s Theorem.

**Student Projects**

Here are some example students projects using Desmos.

A variety of student projects from Fall 2015

Maximize the Area of the Corral

Maximize the Area of the Rectangle Inscribed in the Ellipse

For more examples, go to www.Desmos.com.