American Sign Language Teachers Association
http://www.aslta.org/

EMBE Outreach: American Sign Language Online Video Library
http://www.needsoutreach.org/Pages/sl.html

ASL Linguistics Research Project at Boston University
http://www.bu.edu/asllrp/

History Through Deaf Eyes
http://deafeyes.gallaudet.edu/

Deaf Resource Library
http://www.deaflibrary.org/

Sign Language Structure, Learning, and Change Course at Georgetown University
https://www.edx.org/course/sign-language-structure-learning-change-georgetownx-slsx-401-01x