I just took PT 84 as well and it turned out to be my worst too. I had the most trouble on its RC. I hope it was just an off day for us or the exam was hard in general!
I don't really have a book recommendation. However, I have posed a similar question before and the best advice I have gotten to get better at RC, and science passages in particular, is to read the Scientific American! This will definitely help in ge…
I've only completed 38% of the course, so definitely haven't exhausted 7sage's resources yet. I'll take yalls advice though and just stick with using this! Also, thank you for the recommendation of reading the NY Times and Scientific American for RC…