Generate, generate, generate! Retrieve, retrieve, retrieve! (cont.)
You are much, much, much better off reading a paragraph or two at a time (more, once you’ve practiced this skill and are good at it), then putting the textbook aside and generating a summary of the information that you’ve just read in your own words.
Then, check the textbook to make sure that you have correctly summarized the information, making corrections as needed and incorporating any information that you have left out.