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Copyright and Terms of Use

Unless otherwise noted in source code or on the web page, all programming and files are copyrighted by These programs are provided 'as is' with no warranty or claim to their usefulness. Feel free to visit the website and use these programs for your enjoyment. Redistribution of any material from this site (html pages, images, Flash files, etc..) in any form (website, CD-rom, etc...) is prohibited. The only exception to is that teachers should feel free to download the math worksheets for the purpose of making copies of the worksheets as handouts for the said teacher's own class(es) --no other kind of redistribution is permitted. An individual may not use any content from (worksheets or other) in any kind of commercial context in any form.

Teachers have occasionally emailed me about using this site. If you're a teacher who wants to use the material in your own class, please by all means do so!

Terms of Use & Privacy

  • Privacy Policy

    We respect your privacy and we are committed to safeguarding your privacy while online at our site. The following discloses the information gathering and dissemination practices for this Web site.

  • Opting out:

    Users can set preferences for how Google advertises to you using the Google Ad Settings page. Alternatively, you can opt out by visiting the Network Advertising initiative opt out page click or permanently using the Google Analytics Opt Out Browser add on.

  • Log Files

    Like most standard Web site servers we use log files. This includes internet protocol (IP) addresses, browser type, internet service provider (ISP), referring/exit pages, platform type, date/time stamp, and number of clicks to analyze trends, administer the site, track user's movement in the aggregate, and gather broad demographic information for aggregate use. IP addresses, etc. are not linked to personally identifiable information.

  • Cookies

    A cookie is a piece of data stored on the user's computer tied to information about the user. Our site uses cookies. However, Some of our business partners use cookies on our site (for example, advertisers). However, we have no access to or control over these cookies, once we have given permission for them to set cookies for advertising.

  • DoubleClick DART Cookie

    Google, as a third party vendor, uses cookies to serve ads on our site.

    Google's use of the DART cookie enables it to serve ads to you based on your visit to our sites and other sites on the Internet.

    You may opt out of the use of the DART cookie by visiting the Google ad and content network privacy policy at the following URL -

  • Links

    This Web site contains links to other sites. Please be aware that we are not responsible for the privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of each and every Web site that collects personally identifiable information. This privacy statement applies solely to information collected by this Web site.

  • Advertisers

    We use outside ad companies to display ads on our site. These ads may contain cookies and are collected by our ad companies, and we do not have access to this information. We work with the ad companies: Google Adsense. Please check their websites for respective privacy policies.

  • Contact Information

Terms of use of our image makers and Images

There are many tools on this website that let you create your own images such as our parabola grapher and our graph paper maker. (to name just two examples).

You are free to use these tools and their images under the following conditions. You may not remove the copyright notice that is embedded in the image. Also, you must seek permission from us first -- if you are using these images in a commercial or for-profit context.

The same terms apply to all images and other media including animated gifs.