You really have to go check out each school to decide. It just depends on your child, and the teachers/administration at each school. Private schools can sometimes work out, but are oftentimes bad choices because they are so strict/structured and they tend to think all their students are gifted, so there's no need to do anything different or special.
Also, there's the issue that testing at age 4 is highly unreliable and is oftentimes more an indicator of exposure than intelligence. So what he actually ends up needing in school could vary wildly.
