For individuals with deafblindness a strong relationship exists between communication and literacy, making these critical areas of development. Definitions of literacy for this population must extend beyond traditional notions of reading and writing text to better support communication development. The beliefs teachers maintain, the learning outcomes they set, and the instructional strategies they employ might greatly impact student learning related to communication and literacy. Shared reading could provide a context where communication and literacy skills may be developed for learners with deafblindness. This qualitative study investigated how teachers used shared reading to support communication and literacy development for adolescents with congenital deafblindness. It explored how teacher beliefs about communication and literacy development influenced the learning outcomes they established and the instructional strategies they utilized during shared reading. Data were collected in three secondary classrooms through observations, interviews, and field notes. Thematic analysis was conducted for each individual case and then across cases using a cross-case analysis. For individual cases, themes related to teacher beliefs included connection between communication and literacy, and a comprehensive understanding of deafblindness. Themes related to instructional strategies included communication across multiple forms, focus on the communication process, and systematic instruction. In the discussion of the results, the instructional strategies of the Tri-Focus Framework were used to identify how communication development was supported during the literacy lessons observed. In addition, the use of systematic instruction and formative assessment provided a comprehensive approach to supporting communication and literacy skills during shared reading. Meaningful literacy activities, such as shared reading, have the potential to support communication development for individuals with congenital deafblindness. Teachers require a comprehensive understanding of the nature of deafblindness in order to effectively support an individual’s communication and literacy development.