Step three is where the students learn to read the language structures that they have heard in steps one and two. A number of reading activities are used in TPRS. The first, and most common, is a class reading, where the students read and discuss a story that uses the same language structures as the story in step two. The next most common activity is free voluntary reading, where students are free to read any book they choose in the language being learned. The other activities are shared reading and homework reading. For shared reading, as in first-language literacy activities, the teacher brings in a children's picture book, and reads it to the students in class, making it comprehensible through circling and other means. Homework reading, as the name implies, means assigning specific reading for students to do at home. All readings in TPRS are comprehensible to the students, which means a very low ratio of unknown words (if any).