Really? I thought AAAA enrollments bottomed out around 1600 and maxed out around 3200-3400. Colleton County/Walterboro has been hovering at a low number for years.
The reason why private schools are divided by enrollment is simple: resources. You can't tell me that the larger private schools (Porter, Pinewood, Hammond, Heathwood Hall, etc.), aren't dealing with a diferent set of constraints than schools like Archibald Rutledge and Trident Academy.
