Wolfram|Alpha Online Graphing Calculator

here is a new web resource that will change the way you think about your calculator. not only can you do graphing, but you can do algebra problems, calculate derivatives, even do integrals. the secret is not to become dependent on this technology, because it will not be available to you on exams. instead, the math ninja will use these tools to check their work, and to look for deeper insights into what they are doing.

we’re not in kansas any more, toto!!

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But now here is W|A, which can graph functions, perform symbolic algebra and calculus computations, even solve differential equations and do number theory and statistics and all manner of interesting stuff besides, including but very much not limited to mathematics. In short, it does everything a graphing calculator does. But, importantly: W|A is free, runs on any web-enabled device (including, as I can attest to by experience, an iPod touch), is fast, is portable (see the links I just shared?), and — perhaps most importantly of all –  has an army of developers who are constantly adding new features into the system.