This document discusses bottom-up and top-down processing in reading and their implications for second language reading classrooms. Bottom-up processing involves taking in stimuli from the text and dealing with individual letters and words, while top-down processing is guided by the reader's prior knowledge and expectations. The document provides an example of how a reader may use top-down processing to predict the next word in a sentence. It also discusses how eye tracking research has shown that the eye fixates on words in a text for brief periods rather than sweeping continuously across a line.