Please be advised that. We have launched a new portal for all F-1 requests.You can access MyBruin International using the button below to submit your requests. The first step towards becoming a substitute is to earn the proper permit. There are several permit options that authorize substitute teaching. Visa for stays exceeding 90 days for studies, training, internships, or volunteer work. This visa may also be issued for au pairs and teaching assistants. The first step in filling out your authorization is to gather all of the information you will need to supply. Fill out your application completely. Special Degree Services Request.