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Hey @archenoweth2 , yes you certainly can. I did this using Kaplan only, and didn’t really refer to CFA institute curriculum at all.
That said, the end of chapter (EOC) questions can be useful to practice on after completing each reading, just to make sure you are understanding the key points of each chapter. It’s free practice for materials you’ve already paid for – so it’s something we advise doing for practice.
Hope this helps.