Signing Math Dictionary app for iPhone and iPad

The Signing Math Dictionary (SMD) is an illustrated, interactive 3D sign language dictionary with 705 math terms defined in both American Sign Language (ASL) and Signed English (SE).

The SMD is one in a series of fully animated, illustrated and interactive 3D signing dictionaries. The SMD is designed for grade 4-8 students who are Deaf or Hard-of-Hearing and use ASL or SE in the classroom.

The SMD supports access to standards-based math content among elementary and middle school students and is a great resource for teachers and parents!

The SMD will link to definitions in our Signing Science Dictionary and Signing Science Pictionary which can be found on iTunes.

Our 3D character can be zoomed in or out and rotated to give you the best vantage point for every sign. YOU control the placement of the character – not us!

Use the controls to choose the sign language you prefer; view the illustration; speed up or slow down the signing; and send the character to his "home" or default position. The signing will automatically loop until you go back (using the "back" arrow in the top left corner), thereby exiting from the signing page.

Use the Quick Start Guide in the app to walk you through what the SMD has to offer. For a full description of how to use the SMD, go to www.signingapp.com.


Text and illustrations were developed by and are copyrighted by TERC, Cambridge, Massachusetts. ©TERC, Inc. All rights reserved. SigningAvatar® animation technology and mobile interface were designed, developed and are copyrighted by Vcom3D, Inc. ©Vcom3D, Inc. All rights reserved. Any reproduction in while or in part is strictly prohibited.

The Signing Math Dictionary for iPod Touch/iPhone is developed by TERC and Vcom3D and funded in part by the National Science Foundation, Grant #HRD-0833969. All opinions, findings, conclusions, and recommendations expressed herein are those of the authors and do not necessarily reflect the views of the funders.