I’ve written about Desmos before – they are developing some very interesting online whiteboard software which is still currently in beta.
You can very quickly enter equations using a combination of the keyboard and the pop up equation builder. The lines immediately appear on the graph. Change the equation and see the change in the line straight away. Or layer multiple lines on the same graph.
Here’s what Desmos had to say about it:
We set out to reimagine the graphing calculator from the ground up, building on the best technologies available. This is beautiful, powerful, intuitive math that lives in your browser. Graph multiple functions in vivid color and watch them update as you type. Save your work to the cloud or share it with friends. Transform your computer or tablet into a math engine. This is just the beginning—and it’s all completely free.
Maths teachers should definitely bookmark this. It’s a totally free resource running in HTML5 so it will even run on your iPad via mobile Safari.
Go take a look at Desmos Graphing Calculator here, and let me know what you think in the comments below!