Complex sentence: The northern portion of the hamlet is served by Valley Stream South High School, while the southern portion is served by George W. Hewlett High School, although residents of both areas are ultimately given the decision where they want their child to go.
Split into simpler sentences: The northern portion of the hamlet is served by Valley Stream South High School, while the southern portion is served by George W. Hewlett High School. Residents of both areas are ultimately given the decision where they want their child to go.