Can I take the PA pre-license course with more than one school?

Yes, you may take the 75-hour Pennsylvania pre-license course with more than one school.
Since the 75-hour pre-license course consists of two separate courses (the 30-hour Real Estate Fundamentals course and the 45-hour Real Estate Practice course), you can complete each course with a different school. You will receive a Certificate of Completion for each course, which you must submit to PSI when it comes time to schedule your state licensing exam.
Please note, you cannot earn partial credit from a school for either the 30-hour Real Estate Fundamentals course or the 45-hour Real Estate Practice course.