The Sign Language Documentation Training Center (SLDTC) offers workshops and linguistic training to users of threatened sign languages: currently American Sign Language (ASL) and Hawai‘i Sign Language (HSL). This project originated as a spin-off of the Language Documentation Training Center (LDTC), launched in 2004 by graduate students in the Department of Linguistics at the University of Hawai‘i at Mānoa. In its third iteration, SLDTC has aimed to train users of threatened signed languages to document their own languages in ways that make the information useful for those interested in these languages. The SLDTC also aims to increase awareness of language endangerment and encourage signers to think critically about language revitalization, especially as it pertains to their own languages. The work has been rewarding, but not without its challenges, including technological and orthographic constraints, as well as the challenges of re-adapting spoken language materials for sign languages.