I like that Lisa Delpit book quite a bit.I think that it made me as a teacher, really think about what it means and how I work. So I use more direct instruction, I'm more explicit about rules and how it works, I have no qualms about correction and explaining the intricacies of SAE and why people use and what people assume when one does not.

It's very thought provoking. As is a book called Con Respeto which totally helped me think differently about Latino students and expectations in the Latino community for what schools should do.