Complex sentence: Narrowsburg's school also closed, Jeffersonville's school became the sole elementary school for the region, and a new junior-high and high school building was built in centrally located Lake Huntington, New York.
Split into simpler sentences: Narrowsburg's school also closed and Jeffersonville's school has become the sole elementary school for the region. A new junior-high and high school building has been built in centrally located Lake Huntington, New York.