I'm looking for a couple of studies or at least articles on studies. I've asked on a couple academic subreddits, but no responses yet. I know I had them saved somewhere but I can't find them.

The first was on gender bias in the classroom. The study worked with elementary school teachers. Their classes were tape recorded. Even after intervention and the teachers focusing on calling on girls and boys equally, the teachers were calling on the boys far more. And by the time they were calling on girls more than 30%, they thought that they were calling on girls the majority of the time.

Any other studies on this would be helpful, but I'm primarily looking for this one.

The other was a study on perception of gender in crowds. I think it had to do with cinema but I can't recall. Something about how when women made up 20% of the crowd, men (or people in general), perceived the crowd as being gender balanced.