I'd started seeing comments last week about the depiction of slaves in a new children's book issued by Scholastic about slaves who cooked in George Washington's kitchen. I just saw the announcement today that Scholastic has pulled the book. Here's one author and teacher's account (curating some of the Tweets in that same tool I posted below, Storify).
It's worth a skim to see how people conversed over a few days, learned from each other and disagreed with each other, and how a major publisher then responded.
Update: Here's a news story from NPR on the issues.
Update #2: One educator writes about all she learned from Twitter in the multiple posts about this book.