>>509291864
>An analysis of 35 middle schools, 191 classes, and 4490 pupils combining blind and non-blind test scores of students finds significant discrimination from teachers in that girls are graded more favorably on tests than boys even with the exact same results. Without teachers' bias in favor of girls, the gender gap in choosing a science track would be 12.5% larger in favor of boys.
https://www.sciencedirect.com/science/article/abs/pii/S0272775718307714
>Large scale study of 1200 pupils in the UK finds that female teachers tend to be very biased against male students and that they give male students lower grades and performance reviews and male students are aware
https://cee.lse.ac.uk/ceedps/ceedp133.pdf
>Study of Norwegian students finds that girls are subject to much easier grading than boys
https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1467-8586.2008.00278.x
>An analysis of data offenders convicted of felonies in Chicago, Miami, and Kansas City was conducted to determine whether male and female offenders are treated differently. The authors find no evidence to support this "gender neutrality" hypothesis. In all three jurisdictions, women face significantly lower odds of incarceration than do men
https://journals.sagepub.com/doi/abs/10.1177/0887403400011002004
>Research shows that playful boys are viewed as rebellious and disruptive by their 1st, 2nd, and 3rd grade teachers whereas playful girls are not. As a result of observing teachers' attempts to discourage the expression of playfulness, the boys' classmates changed their view of these "class clowns" from initially positive to increasingly negative. The playful boys also developed more negative perceptions of themselves over time.
https://www.frontiersin.org/journals/psychology/articles/10.3389/fpsyg.2018.00232/full