Co-teaching is an instructional strategy that can be implemented by educators in several different ways. This paper considers how frequently co-teachers implement different approaches to co-teaching and what factors are associated with the implementation of these approaches. This study found that teachers most frequently reported implementing an approach to co-teaching in which one teacher designs and delivers a lesson and the other teacher provides individualised support to specific students with disabilities. The approach to co-teaching in which educators co-plan and co-instruct different components of the curricular content occurred the least frequently. The results of logistic regression analyses indicated that structural aspects of co-teaching (multiple years with co-teacher, time spent daily with co-teacher, number of current co-teachers), teacher attitudes, and professional development opportunities (pre-service and in-service) were associated with the use of different approaches to co-teaching.