Methacton contracts all our per diem substitutes through Substitute Teacher Service (STS).  STS is located in Media, PA with additional offices in Lancaster and Harrisburg as well as Newport, DE.  They service several districts in the tri-county area.  Please visit their website at or contact them by phone at 610-566-6466 (outside the 610 area call 800-357-SUBS) to set up an appointment for an interview.