Funded by the National Science Foundation, The Handheld Science and Math Dictionaries for Deaf and Hard of Hearing Museum Visitors Research Project (DRL-1008546; Signing Science) is a collaboration between the Museum of Science (MOS) and TERC, which studies how visitors who are d/Deaf or hard of hearing (DHH) integrate iPod Touch versions of the Signing Science Pictionary, Signing Science Dictionary, and Signing Math Dictionary into their museum visit. Through this project, TERC has studied the integration of these dictionaries into museum visits of both school groups and family groups. To