Background: This study is concerned with the ways that patterns of student participation in classroom talk are constructed, focusing on silent students who participate in whole-class conversation to a limited extent. Methods: We conducted an ethnographic survey in two ninth-grade classes. We made video recordings of the lessons and interviewed the students and teachers. We observed eight focal silent students--four high-achieving and four low-achieving. Findings: Participation patterns of high-achieving and low-achieving silent students diverge. High-achieving silent students are often called on by the teacher, and they give extended answers to difficult questions. Low-achieving silent students are called on rarely. High-achieving silent students use silence to consolidate their position as exceptionally capable students; low-achieving silent students use it to consolidate their position as less capable. However, it is possible to engage low-achieving silent students if the teacher notices their momentary spontaneous urge to participate and creates space for their voice in the classroom. Contribution: The paper focuses on the silent students who are often overlooked in studies on classroom talk. It calls for specific attention paid to low-achieving silent students who are limited in their learning opportunities and thus facing educational disadvantage.