Complex sentence: The school is in the PSAL (Private School Athletic League) and also in the fifth division, which is the smallest division of sports, consisting of all the small schools with less than 300 students attending the high school.
Split into simpler sentences: The school is in the PSAL (Private School Athletic League) and also in the fifth division, which is the smallest division of sports. Consisting of all the small schools with less than 300 students attending the high school.