At least in Britain, female teachers mark boys more harshly than outside examiners, according to a London School of Economics study.
Expecting lower grades from female teachers, boys worked less in their classes, the study found. Girls think — incorrectly — that male teachers will favor them and work harder for them.
“Students from low-income families and minority ethnic backgrounds do not believe in systematic teacher biases,” researchers reported. They found no evidence of grading bias based on socioeconomic or minority status.