In Philadelphia, Pennsylvania, to qualify as a preschool teacher, one must have a Preschool Teaching License. Anyone with a bachelor’s degree in any subject, along with at least two years of experience as an assistant preschool teacher, teaching certification through the Pennsylvania Department of Education in the subject of early childhood education, or at least 24 semester credits in specific subjects is eligible for this license. Also, you must be 18 years or older and pass certain health examinations (1).