Sounds like you live in RI so there is not much to choose from within a short driving distance. If boarding is an option then Tabor is fine but if again, if boarding is an option then you should consider all boarding options around New England and there are many.
If your kid drives and you don't mind him making a long commute then there are a number of day schools along the 128 stretch from South of Boston to I90 but it all depends on where you live to know if its feasible.