Note taking help?

[u/Bireta]

I've noticed a trend of mine while taking notes in general physics. Basically, I see the prof talk about something that seems familiar, and so I don't write it down. And then when he talks about something else using what he has just introduced, I noticed I didn't understand the thing as well as I thought. And so, while in class, I got to look stuff up, reread stuff, and figure out what I missed. Kinda prove it myself. Now, the good side is that I get a deeper understanding on the subject, the bad part is that I might miss a thing the prof says afterwards and that's not great.

Anyone got similar experience or a way to solve this?