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When you want a quick graph of a function, you can just type in http://graphsketch.com/[function], like http://graphsketch.com/sin(x). You can even separate multiple equations with commas, like http://graphsketch.com/sin(x),x^2.

Although the First Amendment may appear unconditional on its face, the right to speak and write freely has never been absolute. Intellectual property rights often prevail over an author's "creative license." The main benefit of copyright, for example, is the right to exclude others from making copies of a work (or any part of it) without permission. By protecting an author's expression, copyright guarantees that authors and other creators, derive financial benefits from their work. If you intend to use someone's copyrighted work, unless the use is considered a "fair use" (which is technically a defense to copyright infringement), you must obtain that person's written permission. Under federal law, only the copyright owner or someone acting with the owner's authority, such as a publisher, can grant that permission. Without written permission, you expose yourself to legal risks. While not every unauthorized use of a copyrighted work is an infringement, whenever you include another person's words, illustrations, photographs, charts or graphs in a work you publish, you must be sensitive to the risk of infringing someone's copyright. What follows are some common copyright permission myths.

LabWrite provides full support for descriptive labs and labs that students design for themselves. And it includes an extensive set of resources, such as an Excel tutorial and guides for creating tables and graphs, which students can use on their own or teachers can use for in-class instruction.

See how often US presidents have said certain words in their inaugural addresses. Click on the examples on the right, or type in your own word above. Hover over points in the graph and milestones to see names and dates

Easy to use graphing tool-kids will love this!

Very nice analysis of the cost of various materials by weight.

Describes the problem with using miles per gallon as our fuel efficiency metric for automobiles. Points out gallons per 10,000 miles provides better information to consumers.

I could see teachers using forms for data collection with schools across the globe and then exporting the data to graph. Super easy!

Super easy form builder. Provide a link to use for sharing the form and a way to embed it into a web site. Allows sharing of data. Free version allows only 100 submission/month. $9/month will get you unlimited form submissions

Twubble can help expand your Twitter bubble - it searches your friend graph and picks out people who you may like ot follow.