Reading a textbook requires a different approach than reading your favorite novel. It would be difficult and ineffective to read each word of your textbook line-by-line. Since this approach seems so time-consuming, students can avoid utilizing their textbook altogether. However, your textbook contains essential information and should be a frequently visited study material - when preparing for class, when in class, and after class when you have questions.
The SQ3R approach allows you to strategicially read your textbook, using all of the different textual and visual elements that it provides.