When I was at Rice a quarter century ago, I took a 300-level linguistics class called Structure of English. Half a dozen of us sat around an oval table in a little room and I was the only one not majoring in linguistics. It was a delightfully geeky bunch. One of the students later worked on speech recognition at Microsoft. The professor was an older tall thin man who always wore suspenders and a bow tie.
I had always been good at grammar in high school, but this was a different world and I had no idea what I was in for. We spent the first two weeks discussing the differences between the and a, and the next two weeks on the differences between this and that, and the rest of the semester felt more abstract. It was quite illuminating for me.