Another study - from the Brookings Institution - providing evidence of what is already known....but good to keep in mind as the school year starts.
"We find evidence of systematic biases in teachers’ expectations for the educational attainment of black students. Specifically, non-black teachers have significantly lower educational expectations for black students than black teachers do when evaluating the same students. We cannot determine whether the black teachers are too optimistic, the non-black teachers are too pessimistic, or some combination of the two. This is nonetheless concerning, as teachers’ expectations likely shape student outcomes and systematic biases in teachers’ expectations for student success might contribute to persistent socio-demographic gaps in educational achievement and attainment."