NTID's Self Instruction Lab has a wealth of media for support of ASL learning.
NTID's American Sign Language and Interpreting Education Department offers ASL classes, tutoring, workshops and other learning activities throughout the year.
The ASL Video Dictionary and Inflection Guide is a comprehensive online dictionary of ASL. It has video clips of 2,700 signs, and 2,000 of these signs are linked to at least one of the 650 sentences to illustrate how signs change to show different meanings. There are also several interactive features that enhance the learning experience.
Access to the dictionary is provided at the DIG logon page. It's free for all RIT faculty, staff and students, and available by yearly subscription to the rest of the world.
The National Association of the Deaf is a national organization of about 4,000 deaf people. They hold biennial conferences and their website is a great resource for information about language and culture.
The American Sign Language Teachers Association is the national professional organization of ASL teachers.
Gallaudet University is the world's only liberal arts university for deaf people.