Math education, probably. I don’t have any numbers, but there are probably far more people taking calculus in high school than there used to be, and a lot of them are probably taking it earlier than senior year. At least that was my experience compared with my parents’.
Also, this is unrelated, but it’s strange that this post has (at the moment) 20 comments but only 5 votes.
What’s more strange is that 5 people today commented on this 4 month old post.
I was really lonely and scrolling up really old posts in this community to talk in, and maybe others sort their feeds by recent comments meaning my activity pushed it up. Or maybe I just like ascribing more responsibility to myself :PEdit: I sort by recent comments, so this post showed up in my feed. I don’t know why the others started commenting on it 10 hours ago though.
