Signing Science Dictionary Signing Science Dictionary

The Signing Science Dictionary (SSD) is one in a series of illustrated, interactive 3D sign language dictionaries. The SSD is designed for grade 4-8 students who are Deaf or Hard-of-Hearing and use American Sign Language (ASL) or Signed English (SE) in the classroom.

The SSD supports access to standards-based science content and is a great resource for teachers and parents!

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!

The dictionary contains 1,300 science terms.

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. For a full description of how to use the SSD, link to the User's Guide below.

Just $14.99! (iTunes Required)

User's Guide (PDF) | Activity 1 (PDF) | Activity 2 (PDF)


Text and illustrations were developed 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 Science Dictionary for iPod Touch/iPhone is developed by TERC and Vcom3D and funded by the U.S. Department of Education, Grant H133S070088. Previous development by TERC and Vcom3D has been funded in part by the National Science Foundation, Grant HRD-0533057, NEC Foundation of America, and the U.S. Department of Education, Grant H327A060026. All opinions, findings, conclusions, and recommendations expressed herein are those of the authors and do not necessarily reflect the views of the funders.


Judy Vesel, Principal Investigator and Project Director

Wesley Fleming, Senior Web Programmer; Greg Kuchmek, Senior Web Designer and Illustrator; Tara Robillard, Research Associate; Laura Uhl, Editor

From Vcom3D

SigningAvatar® Project Leadership

Ed Sims, Chief Technology Officer

Jason Hurdich, Team Leader, Sign Language Projects

ASL and Signed English Translation

Glenda Freeman, Iris Kinley and Valerie Wilson, Deaf Education Specialists

Megan Helock and Ashley Loomis, Undergraduate Interns

Shelley Popson Ardis, Educational Technology Consultant.

Software Development

Dan Silverglate, Director of Software and Graphics; Tu Lam, Chief Software Developer; Matt Weaver, Lead Software Developer; Lauren Jarrard, Digital Media Software Developer

Character Animation

Teresa Thomasson, Animation/Graphics; Michael Freeman, Modeler/Animation

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