Find out what a sign means with these Great ASL Dictionary apps

The Signing Life Science Dictionary (SLSD) is an interactive 3D sign language dictionary designed for students in grades 7-12 who are deaf or hard of hearing and studying life science content. It is also intended to serve as a resource for teachers and other professionals who work with them. The SLSD is one in a series of fully animated, illustrated and Interactive 3D signing dictionaries designed for students who use ASL or SE for communication.

The SLSD supports access to standards-based life science content among middle and high school students 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!

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 SLSD has to offer. For a full description of how to use the SLSD, go to www.siginingapp.com.

Soon to be available in this series is Diccionario de Señas de Ciencias de la Vida (DSCV). DSCV and SLSD are intended for use together. You can link from each English page in SLSD to a corresponding page in DSCV with Spanish translations of all of its components and all of the illustrated interactive 3D features. The DSCV can be found on iTunes.

The SLSD will also link to definitions in our Signing Physical Science Dictionary (SPSD). The SPSD can be found on iTunes

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 whole or in part is strictly prohibited.

The Signing Life Science Dictionary for iPod Touch/iPhone/iPad is developed by TERC and Vcom3D and funded in part by the National Science Foundation, Grant #DRL-1019542. All opinions, findings, conclusions, and recommendations expressed herein are those of the authors and do not necessarily reflect the views of the funders.

The Signing Physical Science Dictionary (SPSD) is an interactive 3D sign language dictionary designed for students in grades 7-12 who are deaf or hard of hearing and studying physical science content. It is also intended to serve as a resource for teachers and other professionals who work with them. The SPSD is one in a series of fully animated, illustrated and Interactive 3D signing dictionaries designed for students who use ASL or SE for communication.

The SPSD supports access to standards-based physical science content among middle and high school students 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!

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 SPSD has to offer. For a full description of how to use the SPSD, go to www.siginingapp.com.

Soon to be available in this series is Diccionario de Senas de las Ciencias Físicas (DSCF). DSCF and SPSD are intended for use together. You can link from each English page in SPSD to a corresponding page in DSCF with Spanish translations of all of its components and all of the illustrated interactive 3D features. The DSCF can be found on iTunes.

The SPSD will also link to definitions in our Signing Life Science Dictionary (SLSD). The SLSD can be found on iTunes

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 whole or in part is strictly prohibited.

The Signing Physical Science Dictionary for iPod Touch/iPhone/iPad is developed by TERC and Vcom3D and funded in part by the National Science Foundation, Grant #DRL-1019542. All opinions, findings, conclusions, and recommendations expressed herein are those of the authors and do not necessarily reflect the views of the funders.

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.

The Signing Science Dictionary (SSD) is an illustrated, interactive 3D sign language dictionary with 1,300 science terms defined in both American Sign Language (ASL) and Signed English (SE).

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

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 SSD has to offer. For a full description of how to use the SSD, go to www.signingapp.com.


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, NEC Foundation of America, and the U.S. Department of Education. All opinions, findings, conclusions, and recommendations expressed herein are those of the authors and do not necessarily reflect the views of the funders.