A forgotten part of american history

I am an american of polish descent with ancestors that were brought here as slaves. I think it is a travesty that there stories are not in school books. I myself live a pretty good life, but I owe it to them. The only reason I even know about this dark history is my grandfather who was very fond of his mother would often tell me stories of her life as a slave. He even kept her walking papers as inspiration. I would love to reach out to others like myself of european descent someday and come up with some kind of a remembrance so their stories are not forgotten. It is a dark part of our history and it should never be lost to the annals of history.