A great sign language video dictionary http://www.aslpro.com/
The sign language book I was “raised on” was by Lottie Riekehof
Another favorite book is by the beloved Lou Fant. He was a child of deaf parents and he grew up to be an actor and a fabulous sign language interpreter and advocate for the deaf.
One of my favorite signers to watch is the CODA BROTHERS. I need to warn you that they are not always appropriate for younger kids, but they are a blast to watch.