He has online modules for each major subject based on the Exam spec that you complete at your own pace, and also he does I think 11 4 hour live classes, once a week, leading up to the exam. Each module for the online course has multiple sections. In each section he has a bunch of 5-10 minute videos that cover a single topic or a single problem. These videos build on each other until the end of that section. At the end of the section he has all required formulas for your reference material and also a 10 question or so quiz with extremely detailed answers.
His live class will cover one topic a week and you get printouts prior that you follow along with. There is a chat that's super interactive and he'll ask or answer questions with it along the way and other engineers will chime in if they're experienced with your question.
He also has discussion boards for asking questions and receiving help with problems.
The thing I really liked about Zach's course is that he has a wealth of knowledge for test taking strategies so that you utilize all your time and don't make careless errors. He's constantly reminding you to show all work and write all units and vector hat.