Terrible professor, but straightforward if you can teach yourself from the textbook

In my experience, the lectures are useless. Instead, read and study the textbook, and do the cases. There will be a practice exam, then the prof will go over the practice exam. Study for the practice exam as you would a regular exam, and carefully do the cases. Then attend the class. This is the only class you must attend. Take note of everything you missed. The exam questions are just like the practice exam ones.