Top 10 most Expensive Private High Schools in America: tuition fess will shock youBy DreBoam / July 2, 2018 7. Groton School, Groton, Mass. Wikimedia Commons Day student tuition: $38,420 Boarding student tuition: $49,810 Enrollment: 466 Endowment: $237 million Fact: Groton’s grounds were designed by famed landscape architect Frederick Law Olmsted. Prev4 of 10NextUse your ← → (arrow) keys to browse