Treat chapters of a textbooks as a book each.
If you know how to use the PhotoReading system you'll be applying the 5 day test approach to your books, textbooks and reading material anyway. If you're spending 30 minutes a day on activation you're well on your way to activating a book per week.
If you're already activating your study material what are you worried about activating for? You're already doing it.
Alex
