Black teachers and male teachers are rated lower during teacher observations than white teachers and female teachers, despite comparable or better outcomes for their students in test scores and student attendance.
Interestingly, the bias against male teachers is around twice the bias against Black teachers.
https://mitili.mit.edu/sites/default/files/project-documents...
https://ideas.repec.org/a/uwp/jhriss/v48y2013i1p236-264.html
(Not the exact studies I remember seeing.)
It's a common finding and one of the rare effects in the social sciences that are very reproducible.