Probably not shocking, but you'll do much better in topics that you are truly interested in. Nearly my entire class struggled with Pulm, but I found Pulm pathophys so fascinating that I was watching videos about it on a Saturday night just to find out more. Typically there's hardly ever time for that in PA school, but Pulm has still been a topic I feel very confident in and it was entirely because I was interested and spent that extra time on it.

Other than that... I agree - mandatory lectures are usually a thing to sit through so then you can go home and teach yourself. It's frustrating, but as I keep reminding myself - it's only 2 years.