Public finance class always became my drawing and sketching class. It is always hard to pay attention to the lecture. It's nothing wrong with the lecturer. It's just my ADHD things. To avoid my eyes to close and sleep or my hands to poke or doing something to disturb my friends, or my mouth to start talking this is the only cure:
There's no drawing process, I wasn't pay attention to any details, just a simple sketch using a mechanical pencil and an A4 paper which appears to be the back side of my lecture notes. Well, at least my ears could listen to the lecture 'a bit' when I did this instead of sleeping.