MathTerms is an illustrated glossary of mathematics terms in English and Spanish. The app includes almost 1,000 entries for middle- and high-school mathematical concepts. Millions of students have had access to this glossary, and its colorful, annotated illustrations, for over the past five years. It is now available for Apple iPad, Barnes & Noble Nook and Amazon Kindle with permission of The Charles A. Dana Center at the University of Texas at Austin and Agile Mind, Inc.

For support, you can send an email to: MathTerms AT AndyFelong DOT com.


Privacy and data collection

MathTerms collects NO personal information, NO data on usage and has NO internet connection.  MathTerms contains a few links to external sites for app support and to credit content creators.  These links brink up web pages in a web view but do not convey any information in doing so.

10 Comments (+add yours?)

  1. Peter
    Jul 28, 2011 @ 16:45:07

    Nice iPad app, and thanks for making it available for free. I noticed a couple of minor issues in the current version (e.g. the division property of equality has a typo in the formula). Let me know by email if feedback on some other entries would be useful.

    • andy
      Jul 28, 2011 @ 17:07:29

      Thanks, Peter, I’ll take you up on your offer for feedback!

  2. Jordan
    Jan 01, 2013 @ 20:21:32

    Great app. It will help me out greatly, and will extend my math capabilities b/c they’re not good right now. There’s one problem I would like fixed. I would like to see vocab words categorized into sections that have to do with the class. Like algebra words in an algebra section, geometry words in the geometry section, and so forth.


    • andy
      Jan 02, 2013 @ 19:42:30

      Hi Jordan, Under the hood, I do have terms associated with courses (middle School 6-7-8, Algebra, Calculus, etc.). If I do an app update, I’ll add this filter capability. No current plans, however 🙁

  3. Henry Sun
    Mar 05, 2013 @ 16:02:22

    Do you have any plans on releasing this app in the Google play store?

    • andy
      Mar 10, 2013 @ 18:28:27

      Hmmm, I *could* submit to the Google Play store. I already have Android support due to Nook and Kindle fire efforts. I might need to change some messages and should check layout on different resolution and aspect ratio devices but I tried to make things device independent. I’ll think about this…

  4. Bill Bajorat
    Nov 11, 2013 @ 11:58:46

    I do tutoring for h.s. Students. This app has considerable potential for my clients. However, I detected an error with the image used in defining Vertical Angles. Thought you would like to know.

    • andy
      Nov 19, 2013 @ 17:37:04

      Thanks Bill, I can see the issue – now that you pointed it out 😉 I’ll put in the to-be-fixed bin. Not sure when I’ll update MathTerms though.

  5. Bob Mathews
    Jul 02, 2014 @ 15:44:41

    Thanks for this. I’m not familiar with the MathTerms dictionary from the Dana Center though. Couldn’t find it on their site either. Do you have a link?

    • andy
      Jul 03, 2014 @ 18:02:14

      Bob, MathTerms’ data and images were extracted and transformed from the English/Spanish Glossary “feature” that is found in Agile Mind programs which serve Middle- and High-School teachers and students in the areas of Mathematics and Science. The Glossary content was authored by Agile Mind and the Charles A. Dana Center at the University of Texas at Austin. It does not exist as a stand-alone online service.