If you are already in the country on a visitor visa, it is possible to apply for a study permit from within Canada.  Please note that processing of applications submitted from within Canada is not faster than it would be from outside of Canada.  The application process is exactly the same as it would be from outside of the country. Applicants who have a visitor visa and apply for a study permit from within Canada do not have a better chance of getting a study permit approval. Applicants still need to meet the criteria for the study permit application, in the same manner as is expected from an applicant applying from outside of the country.