Complex sentence: The Hillel Yeshiva Elementary School is compiled of two divisions, one that ranges from first to fifth grade, known as the elementary school, and one that ranges from sixth to eighth grade known as the middle school.
Split into simpler sentences: The Hillel Yeshiva Elementary School is compiled of two divisions. One that ranges from first to fifth grade, known as the elementary school, and one that ranges from sixth to eighth grade known as the middle school.