Have not started pts yet. But mathematically, you do not understand algebra until you understand calculus? So, hence repetition, sometimes after learning everything it is okay to review previous topics
I hope they do and quick though...if 7sage doesn't communicate something clear , just look at the Trainer.... it really does help in providing text based help, which is the only drawback of online learning
I like 7sage's categorization (and overall LG advice) better than Powerscore's. I'd keep the PC book to do the games in the back of the book, but I'd use 7sage for the actual learning process.