It doesn't hurt to PhotoRead the school textbooks. Get more books of your own that interest you and use the CD for working through your own book. Use that for Day one of the 5 day test on the book (page 76 of the PhotoReading book) Then do an additional 4 20-30 minute activation sessions on the book. Do that for 4 or 5 books and you will know how to PhotoRead effectively.
Remember to check your purpose and a tip the first 2 or 3 30 minute sessions may feel like nothing is happening then it all falls into place and suddenly that becomes your last activation pass.
Another tip mind map after each activation. This will help you when you are studying. Mind maps are much easier to review than notes and take less time to create than notes. If you're not used to mind mapping now is a good time to play with it. It will be a bonus when it comes to reviewing before exams.
Alex