In guided reading, the teacher guides small groups of students in reading short, carefully chosen texts in order to build independence, fluency, comprehension skills, and problem-solving strategies. The teacher often begins by introducing the text and modeling a particular strategy. Then students read to themselves in quiet voices as the teacher listens in, noting strategies and obstacles, and cuing individual students as needed. Students then discuss content, and share problem-solving strategies. Guided-reading materials usually become increasingly challenging and are often read more than once. The teacher regularly observes and assesses students' changing needs, and adjusts groupings accordingly. Guided reading allows a teacher to provide different levels of support, depending on the needs of the students.