Complex sentence: Hillsboro High School is the only school in the Hillsboro School District to offer IB (International Baccalaureate) classes as ither Hillsboro schools offer the more traditional AP classes.
Split into simpler sentences: Hillsboro High School is the only school in the Hillsboro School District to offer IB (International Baccalaureate) classes. Other Hillsboro schools offer the more traditional AP classes.