This is so true! Back in the dark ages, my high school didn’t offer AP physics, so it was just “Physics”. The teacher was in his last year before retirement and really wanted to retire the previous year but couldn’t for some reason (he told us this). He kept reminding us he didn’t want to be there. But he made it super easy on us and gave group tests, open book tests, and once actually left the answer key on his desk, told us it was there, and left the room!
I learned very little but of course only someone truly trying to get a bad grade would have gotten anything other than an A
These days even with AP tests to consider, at least there is a plethora of self study material available!!!