an innovative math experience for kids 10~12

numbers don't lie



since 2003


Last Updated: November 18, 2018

Please read this Terms of Use agreement carefully.  Your use of (as defined below) constitutes your agreement to this Terms of Use agreement and the Privacy Policy.


1. Introduction

This website is the official site of Barry Hoffman. Please direct any comments or questions to him directly at By using this website you agree to the following terms:


2. Copyright

This website, namely its design, text, graphics, and photos are protected by copyright. None of the materials on this website may be downloaded or printed without the direct permission of the owner of Any unauthorized use of the materials on this website is strictly prohibited.


3. Disclaimer

In choosing the content for, including the links accessed from this site, Barry Hoffman has attempted to choose only content which is beneficial for students and are provided without any representations or guarantees. Any link accessible from this site, or feature of this site, is believed to be appropriate for school age children. However as is the nature of the internet, anyone using these links can link from site to site and may end up in an inappropriate place. These external information sources are outside Barry Hoffman's control and it is the responsibility of the internet user to make their own decision about the appropriateness, accuracy, and correctness of information found. The dynamics of the internet prevents the guaranteeing of suitability and completeness or accuracy of any material to which this site may be linked. If you find a direct link to inappropriate material, please contact Barry Hoffman using the Contact form at the top. The creation, management, and contents of this site are Barry Hoffman's sole responsibility and in no way are directly connected to, nor necessarily reflect, the opinions or views of the Port Washington School District, Port Washington, New York.


4. Links (URLs)

All the internet addresses linked in this site were current at the time the page code was written. While regrets any inconvenience this may cause, Barry Hoffman cannot accept responsibility for any such changes. To help decrease the number of dead links, please report them using the Contact form.


5. Member Areas

Please be aware that access to certain areas of this website (Online Classroom, Classkick, Maxkids, and others) is limited to registered members. All information gathered upon registration is for internal use only and no personal data will be passed on. The user guarantees that the information entered is correct. Social areas of the website, including the links, are provided without any representations or warranties. Each visitor is solely responsible for his messages. By using the social areas or forms you agree to:


*Not post any inappropriate pictures or text, or include any vulgar language in any posts including contact forms.
*Not abuse, harass, or threaten others

*Not draw or post any disturbing or threatening messages or inappropriate language

*Not use any other person's name or text but your own real name in any forms, or any other area of Hoffkids where it asks you for your name (HW Page, How Am I Doing, Contact, 121 Challenges, DJ Request, and others)


Barry Hoffman reserves the right to check, remove, or edit messages and content at any time and for any reason. Should you find any material which you consider harmful, offensive, or otherwise in violation of the above mentioned guidelines, please email Barry Hoffman at, and the material can be removed from the website immediately.


All materials © 2003 –2018 unless otherwise noted.  All rights reserved.