Complex sentence: Since the school was in a rural location at the time, Bethel had the biggest school zone in the whole city; basically anyone from Langley Air Force Base heading west towards the city of Newport News was all zoned for Bethel.
Split into simpler sentences: Since the school was in a rural location at the time, Bethel had the biggest school zone in the whole city. Most residents from Langley Field heading west towards the city of Newport News was all zoned for Bethel.