Complex sentence: Iona Prep consists of the Upper School for grades 9 through 12 and the Lower School (formerly Iona Grammar School) for grades kindergarten through eight, which are located on separate and nearby campuses less than one mile apart on Stratton Road.
Split into simpler sentences: Iona Prep consists of the Upper School for grades 9 through 12 and the Lower School (formerly Iona Grammar School) for grades kindergarten through eighth grade. The primary and secondary schools are located on separate and nearby campuses less than a mile apart on Stratton Road.