What people forget. With textbooks and school books their goal is to learn something from those books. Now they have a reading system that works for them and they want to learn another.
Doesn't it make sense to test the new system on something that you won't regret getting it wrong on first?
Like buying a new fancy bike or skateboard for competition don't you run trials to make sure the equipment is run in and you are familiar with it's handling?
Learning to PhotoRead is like learning to juggle knifes... you already know how to read (juggle) That's the next step. School work is like learning to walk on a high wire. Wouldn't you want to be confident at least in one skill so you can concentrate fully on the other?
Another reason for not working with textbooks is textbooks are multiple books in one. Ideally you've learned how to tackle one book before you try doing a stack of books with different purposes in one go.
To answer the original question. PhotoReading is the next step in reading. Anything you can read you can use the PhotoReading system on; once you've learned the system.
Alex
