In Illinois, you must have at least a bachelor's degree to become a substitute teacher. You may apply through the Educator Licensure Information System (ELIS) for a substitute teaching license. Application for a substitute license currently costs $50 (plus $10 yearly registration fee) and requires the application form and official transcripts. Note that once you earn your teaching license, you can be employed as a substitute teacher without possessing a substitute teaching license. Please visit ISBE's website for more information on substitute teacher licensure.
Chicago Public Schools (CPS) have additional requirements in order to substitute teach in their schools. Please visit the Chicago Public Schools website for more information.