I found this class to be a bit difficult mainly because there’s a whole lot of material: 17 modules worth.
It took about 3 days to complete this class. The material is dry. I took the PA after the first day and, while I passed, I was just barely over the cut score. I spent the next two days doing the modules and specifically, the unit quizzes, before finally taking and passing the OA. I was glad to get this class behind me.
This YouTube playlist helped me out a lot, specifically the first video detailing how to remember the derivative metrics.
https://www.youtube.com/playlist?list=PLf3p7LFZ5ibppV0z2VE5M-LBpxQb-m2Yt
Earned Value Management Formulas
This class covers a lot of material which requires a lot of memorization. Learn the formulas and how to read a Gantt chart.