Substitute Teacher Service

Substitute Teacher Service, Inc. was founded in 1994 in Aston, Pennsylvania. (STS) is a customer service-based organization, dedicated to providing our clients with a workable, cost-effective solution to their substitute professional and support personnel needs as well as giving exposure to our employees in the many districts we service. STS is the foremost locator of substitute teachers, teacher aides, and support personnel in Pennsylvania. At STS, we supply our client school districts with the professional and support personnel they need, when they need them.