I managed it for 4 years in college, with usually 3 hours of lecture per day. Was it work? Sure. One was busy the whole lecture. But the results were clear.

My favorite pens at the time were the Pilot pens. Today I love the Tul pens.

I have long since scanned them all in. I should post them on my website, just for fun.

3h of lecture per day isn't much for university.

Why are you focusing on what they are saying, rather than what they are writing (there's an important distinction)?

I would copy what they were writing. The professors had 9 blackboards available, and they'd use them all during a 55 minute lecture, and then some. Some would write with their left hand while erasing with the right (!). It was a heluva time for me. Never before or since have I learned so much so fast. Blink and I fell behind.

In retrospect, I sorely wished I had set up a cassette recorder and recorded all the audio. It would be a gold mine today, as all those lectures are lost to time.

On the other hand, I had no money to buy cassette tapes at the time.

I never learnt much in those sort of lectures. Eventually I figured out I needed to study the material before the lecture and use the lecture to cement what I had already learnt or occasionally answer questions that had come up.

Sorry, I was replying to guappa suggesting that they were focusing on the wrong thing.