This article investigates the perceptions of 12 teachers from New South Wales, Australia, regarding the classroom assignment of twins. Analysis of semi-structured interviews with each of the teachers revealed four key findings: 1) teachers' perceptions about the classroom assignment of twins vary according to their previous experience and relationship with twins in their personal life; 2) there are no sector-wide policies regarding the classroom assignment of twins; 3) setting size is a major factor influencing teachers' perceptions of the classroom assignment of twins; and 4) formal training does not refer to twins and their education. Recommendations and implications for teachers are discussed. (Contains 2 tables and 2 notes.)