Complex sentence: There they opened up school for preschool-4th grade Soon Cornerstone had three separate locations in downtown Bloomington, (Faith United Methodist-Preschool, Grace United Methodist-Elementary and 2nd Presbyterian-Middle school).
Split into simpler sentences: There they opened up school for preschool-4th grade. Later, Cornerstone had three separate locations in downtown Bloomington, (Faith United Methodist-Preschool, Grace United Methodist-Elementary and 2nd Presbyterian-Middle school).