I studied differently. I used 4 books to study. Davis Q&A for the nclex rn, Saunders comprehensive review, Lippincott's Q&A review for the nclex rn & Nclex RN Q&A made incredibly easy. Pre-lecture, I would do 100 questions from incredibly easy for the corresponding topic to be lectured in class the week ahead. Then I'd read the rationales, both wrong & right , typing what I felt was important. Next, I read the corresponding chapter from Saunders review book, adding to the notes I took from the rationales. Armed with this, during lecture, I fairly knew what was being lectured. I also brought my questions to class. Post lecture, I did 100 more nclex questions of the corresponding chapter from both lippincott & davis, compiling more notes. It was these compiled notes that became my bible. For the weekly exams, I went from 15/20 to 18/20 or 19/20. That's when I knew this system worked for me.
If you do have summer holidays, I suggest you find a system that works for you. All the best, cheers.