There are four bargaining units represented by the OSSTF in District 11.
Teachers' Bargaining Unit
The Teachers' Bargaining Unit of OSSTF District 11 is made up of close to 2000 Secondary School and Continuing Education Teachers of the Thames Valley District School Board who teach in the 30 secondary schools, "alternative school" locations, and Adult Continuing Education learning centres.
Occasional Teachers' Bargaining Unit
The Occasional Teachers' Bargaining Unit is made up of Short Term Occasional Teachers (daily rate supply teachers) and Long Term Occasional Teachers (paid on the grid).
Professional Student Services Personnel Bargaining Unit
The Professional Student Services Personnel Bargaining Unit consists of members in Psychological Services Speech-Language and Audiology Services, Research and Assessment Services, School Counselling and Social Work Services, and Environmental Education.
Continuing Education Instructors Bargaining Unit
The Continuing Education Instructors Bargaining Unit consists of approximately one hundred and thirty members in total; they are English as a Second Language Instructors, Adult Basic Education Instructors, International Languages Instructors, and Driver Education Instructors.