Free Desmos Online Graphing Calculator

So I don't know what is with me. How has it taken me this long to blog about the Desmos Online Graphing calculator? I have been using this for a while now and I keep using the word slick to describe it because I think that best describes it. Its not very complicated and it allows you to create graphs from functions (in both explicit and implicit forms),  use sliders, plot moveable points, construct tables and more. Check our more "How To" videos on their YouTube channel.
Check out my quick tutorial here:

As I mentioned in the video, one of the neat things that the Desmos people have done is to create some interactive tutorials. In these you actually work right in the graphing calculator and get prompts to show you exactly what to do. Right now there are only two, one for creating tables and one for creating sliders but hopefully they will create more.

Keep up the good work Desmos, the math-o-sphere loves you.