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Shirley Crippen said parents do not need to spend a lot of money to learn sign language. She recommends the “Signing Time” videos. (“Signing Time! Volume 1: My First Signs,” VHS, $16.99, Amazon.com) ...

Rochelle Sanchez said she was just 13 when she became fascinated by sign language after seeing it portrayed in the TV series “Little House on the Prairie.” “They had an episode with a deaf child, and ...