Complex sentence: The Circle School is an Integral school located in Harrisburg, Pennsylvania and founded in 1984, and is operated similarly to the Sudbury model established by the Sudbury Valley School in Framingham, Massachusetts.
Split into simpler sentences: The Circle School is an Integral school located in Harrisburg, Pennsylvania and founded in 1984, and is aligned with the Sudbury model. The term Sudbury School means that it is modeled after the Sudbury Valley School in Framingham, Massachusetts.