Finding a teaching position in Ontario has become more challenging in recent years.
You can find extensive information regarding the process of applying for a teaching job in Ontario on the employment section of the Teach In Ontario web site. Although primarily developed to assist internationally educated teachers navigate the Ontario job search process, Teach in Ontario includes excellent advice that can be used by teachers prepared here in Ontario too, including a section on working as an occasional teacher.
Many school boards in Ontario rely on employment websites to advertise and fill teaching openings. The four main sites that are commonly used are: