Davidson academy is for 6th grade and above but your son can start with Davidson Young Scholar which you still need IQ test, achievement test or talent search test(such as EXPLORE) and or portfolio showing advance level of your son's work.

You can check which IQ test your son has taken with MENSA and see if that test is one of the accepted test. He may do WJ III or WIAT III if he can't take EXPLORE yet.

http://www.davidsongifted.org/young...holars___Qualification_Criteria_384.aspx


I would probably wait to take EXPLORE. (very cheap compared with achievement testing).