This book - True Biz by Sara Nović - taught me so much. And it is such a good book. I highly recommend reading this. It takes place at a school for Deaf students, and the reader gets to see the trials of living in our society that is building for the hearing. But also, the joys of being in the D/deaf communities and how rich communication can be without hearing. 

If you read the physical copy, there are excerpts throughout the book that teach some signs and also about D/deaf history and culture.