I remember this history teacher who was a breath of fresh air. He told us in advance his test where very simple. And the reason was quite genius: if you just listened and took a few notes here and there, you’d pass the test. Which freed the mind to really absorb the knowledge and have fun with the subject matter. He was also very good in discerning knowledge and teaching why a certain topic was good to know. I think I remember more from those classes than any other.