Learn the vapor compression cycle, period. He is always available to provide extra hands on lab time, one on one Q & A, and even guidance with degree scheduling.
The class I took was a hybrid. It was a fire hose approach to presenting the subject matter. Every class was hurried and many slides were skipped. Items where highlighted on the slide so that we would know to focus on those. IE, know them for the tests. But they were not even on the test. A large chunk of the slides and his personal pics of wandering around the globe.