Teaching at every level is quite humbling. I studied Banking and Finance and I remember getting into teaching during my Final year in Uni.
That was a very rough experience on my part. I had to deal with a lot of students who were not as serious as I imagined they should have been. Lol.
Thank God though. That stage of your life has passed
It's frustrating on the part of the teacher to have exerted much effort to make the discussion as informative as possible, but the students are not even listening. Hehe.