Could you put him in Kindergarden this year... see how he does... then if he doesn't do well, he can be placed in a K/1 class (basically a combined class of kindergarden and 1st grade then on to a regular 1st grade or second depending on his emotional development. If he is at an advanced educational level, he may always be the youngest in some of his classes due to his mental ability. Call the councelor at his school... they may even evaluate him for you.