Web software used by Upper School math

Upper School math teacher Chip Rollinson uses a variety of web-based tools with his students including the Desmos graphing calculator. This free website allows anyone to create and manipulate mathematical functions that are also displayed in a corresponding graph. For example, here is the equation and its result for an ellipse:

Doing this kind of work used to require expensive software or a graphing calculator. Now it is accessible online for free. Anyone with a web browser can get to it. Tools like this are a great example of why students should have ubiquitous access to computers and the internet.

Here is a link to Mr. Rollinson's presentation on this tool that he put together for a summer workshop of mathematics educators.