Why is school enrollment decreasing and should that lower school taxes?

Long Island voted on school budgets last month, most were approved and most public school districts raised taxes to cover increasing costs caused by inflation and pension changes. Yet there are fewer students to educate. Long Islanders are getting older, families are having fewer kids, or they are leaving for less expensive areas. Others are choosing homeschool or charter schools. Why has enrollment has fallen in your area? Should the decline in public school students result in lower school taxes?