By Leader Staff The Half Hollow Hills and Cold Spring Harbor School Districts were ranked as the "Best Schools and Districts" in Suffolk County, in the 2027 Niche Study on public schools across the United States. The Half Hollow Hills (HHH) district includes Dix Hills and Melville, and earned an A+ overall grade. HHH ranked Number 1 in Suffolk County, Number 13 in New York State, and Number 59 nationwide. The HHH district has 7,302 students in pre-K through 12th grade