This is a very honest and unflinching discussion of our unconscious biases, not about gender, but about race. In one segment, a researcher explains how unconscious bias might work in a classroom. The film isn't judgmental or accusatory and repeatedly stresses the fact that we are usually not even aware that we are acting in biased ways.
For a clear and powerful explanation of just how unconscious bias works in humans, watch this short video. It explains that we all make decisions about people in milliseconds, based on whether they are like us, or not.
Should teachers avoid calling attention to gender, except when it’s really necessary? This article in Teaching Tolerance explains that calling attention to student gender, rather than particular personalities, achievements, or skills, encourages gender stereotypes as early as kindergarten
Much attention is paid to gender bias against girls in math and science, but this article examines a study that showed teacher preference for girls (and higher grades), starting in kindergarten. The study suggests that the skills of sitting still, being quiet, and showing attentiveness -- all of which generally happen earlier with girls -- play a role in grading.
This Hidden Brain podcast transcript discusses a study in which teachers who knew students gave higher math scores to the boys than to the girls, while other teachers, who did not know the students, did not. The study also follows the students into high school, to explore whether this disparity affected their academic choices.
David Sadker, author of Failing At Fairness: How Schools Cheat Girls, lists several ideas for how to "call on" students equitably in oral discussions. Hint: It doesn't involve telling students to raise their hands.
If you're aware of the problem of gender bias, but don't know what to do about it, this toolkit for teachers from the Harvard Graduate School of Education will help you confront the problem. The guide includes case studies and discussion questions, as well as activities, for middle and high school students.
This article discusses two recent studies that reveal a significant impact on students because of teacher bias based on gender and race. The first showed that teachers give better math scores to boys than to girls, and the second finds that black girls are much more likely than their white peers to be suspended from school.