Best strategy is to finish the course first. Then apply it to study material. Know how to PhotoRead then use it for textbooks.
When you've learned PhotoReading. Pile, purpose PhotoRead and activate accordingly. Work in short blocks of time activate, learn in layers. Build your mind map with each pass.
Textbook PhotoRead the whole book. Then activate the relevant sections by PhotoReading the 2 chapters before, the core chapter/s and two chapters after. No incubation required move straight into activation (you've PhotoRead the textbook before. Treat each chapter as a book on it's own. That means activate it fully before starting another chapter.
Focus on using what you know. If you don't feel you have time to learn PhotoReading away from your textbooks then don't add to the work load. If you're relatively confident you can and have done the course as instructed but not confident in activation using Superread And Dip or skittering. Or lack confidence in recognising your purpose then. PhotoRead the material daily (all of it) and study using what you know works for you.
Since you are behind be wary of learning something new only so you can procrastinate on applying yourself using the skills and resources you have already developed.
Alex
