To achieve true mastery of reading, make the most of your peripheral vision. Strengthen this skill by quickly glancing at phrases then attempting to recite them. The indenting method builds off this by suggesting readers aim their eyes on the center of a line of text, without focusing on words within a half inch of either margin.
The yellow book goes into a huge level of detail about the strategy and how it worked. And if you want all the rules in one simple PDF, here you go. One of the original Turtles gave them away free. I’m going to go further than that though.