Accreditation is a form of independent, professional certification that assures international students and their parents that a Canadian school or program adheres to high quality standards. It means the programs are delivered by qualified faculty and are constantly updated to follow the changes and meet the needs of the working world. Therefore, attending an accredited school or program is often thought to make you more competitive in the job market.
While there is no national accrediting body in Canada for teacher education schools and programs, the government of each province or territory in Canada is responsible for regulations regarding teacher training. For example, the British Columbia College of Teachers will have different program accreditation requirements than those of the Ontario College of Teachers. You may also find provincial accreditation bodies for specializations within the field of teacher education, such as the Association of Early Childhood Educators Ontario (AECEO). International students can also look at whether a school or program has any memberships in, or endorsements by, discipline-specific professional associations which reflect certain standards of quality, but this is not the same as official accreditation.
The goal of accreditation and professional memberships is to ensure that the education provided meets acceptable levels of quality. Accrediting agencies, which are educational associations of regional, national or international scope, develop evaluation criteria and conduct peer evaluations to assess whether or not those criteria are met. Institutions and/or programs that request an agency's evaluation and that meet an agency's criteria are then "accredited" by that agency.