an innovative math experience for kids 10~12

numbers don't lie



since 2003

 Privacy Policy

Last Updated: November 18, 2018

Barry Hoffman ("Owner"), who is the creator and sole developer of, operates and is responsible for all aspects of He is committed to protecting the privacy and security of its online visitors. Owner is also extremely sensitive to concerns from families and educators about children's safety and information related to them. Owner wants you to know about and understand the measures he has taken to keep a safe and secure environment for everyone. This privacy policy tells you about the types of information that is collected from you, how the information is collected, and how that information is used. reserves the right to revise this privacy policy at any time and such revisions shall be effective immediately upon notice thereof. Notice may be given by any means including, but not limited to, posting the revised privacy policy on this Website. Any use of by you subsequent to such notice shall be deemed to constitute acceptance by you of such revision.

When you use, personal information may be collected from you. Personal information means information that could identify you directly or indirectly, such as your name or email address. When a student creates a user account in one of the various areas of, Owner may request that he or she create a unique username and password. contains contact forms where free form entry is permitted. All information is sent directly to Owner and is not shared with anyone.  Owner may collect personal information from you when you interact with by filling out a form such as a contact form or registering for a user account or participating in a public posting.

HOW YOUR INFORMATION IS COLLECTED may collect anonymized information from your computer or device such as browser type, operating system, referring pages, pages visited, time spent on a particular page, IP address, and other analytics to help run most efficiently.  An IP address is a number that is assigned automatically to your computer whenever you use the World Wide Web. Web servers, the big computers that "serve up" Web pages, automatically identify your computer by its IP address. IP addresses are not connected to personal visitor names, and Owner does not know visitor names from an IP address. may also use similar technology to track your usage of the Website, track response rates to certain activities, and identify certain information on how and when a visitor accessed such as type of browser, operating system, domain names, and IP addresses. Hoffkids uses Clicky Web Analytics to log and analyze the traffic to the web site. This cookie allows Owner to monitor use of Hoffkids. It will stay on your computer indefinitely, unless you delete it. You may review Clicky's privacy policy HERE. Hoffkids logs "personal data" to Clicky for the stated legitimate purposes: a "Unique ID" tracking cookie to identify unique visitors and your IP address for security and fraud prevention.




HOW YOUR INFORMATION IS USED may use your information to improve the website content, services, and applications that are provided to meet your needs and interests. When you make a donation through this Website, you are providing purchase transaction information to through a third party service provider (such as Paypal) who will use the information solely for the purpose of the transaction.  There is no advertising on and no private information will ever be transferred to any such 3rd party.


When visitors request pages from sites, our servers log users' IP addresses. We do not link IP addresses to any personal information. may collect IP addresses for system administration. Your IP addresses will be used to identify a user in the following situations: (a) in response to subpoenas, court orders or legal process, to the extent permitted and as restricted by law; (b) when disclosure is required to maintain the security and integrity of this site, or to protect any user's security or the security of other persons, consistent with applicable laws.

The anonymized information tracked with cookies is not used to identify, or lead us back to, any particular visitor. Visitors to may have the option of disabling cookies via their browser preferences (most browsers are initially set up to accept cookies). Cookies make easier for you to use because they save your preferences while you are visiting the site (although we do not save passwords in cookies). Cookies also help Owner to know which areas are your favorites, which areas need improvement, and what technologies and Internet services our visitors are using. Knowing this information helps Owner continually improve the online experience for the visitors and members of may also use third party vendors who supply applications (such as Classkick or Online Classroom), web hosting, and other technologies for this Website that may have access to your personal information and anonymized information, but they will never use such information for any other purpose except to provide services in connection with this site.

You will find links from to independently owned, controlled, and/or managed Websites whose content is believed to be of possible interest and value to the visitors.  In many cases, these links represent cooperative projects or mutual links established with the organizations connected with these sites. Owner does not control the content of these links. These other sites may send you their own cookies, collect data, or solicit personal information. Owner cannot control these cookies or the content of these third parties. has partnered with other companies to provide certain math and educational services. does not share any of your personal information with these partners and they do not share any information with Owner.

Once you leave servers (you can generally tell where you are by checking the URL in the location bar on your browser), the use of any information collected from you is governed by the privacy policy of the operator of the site you are visiting.