Complex sentence: SCH was formed in 2011 with the merging of all-boys Chestnut Hill Academy and all-girls Springside School, creating a single entity composed of five divisions: a co-ed upper school and single-sex middle and lower schools.
Split into simpler sentences: SCH was formed in 2011 with the merging of all-boys Chestnut Hill Academy and all-girls Springside School. The school comprises five divisions: a co-ed upper school and single-sex middle and lower schools.