One, this is oddly progressive for the predominantly republican state of Arizona.
Two, I don't think it's a good idea. Not everyone has the special talent for programming. Others (myself included) are marginally decent at it, but still have no desire to actually do it. Those who have the interest and drive to learn how to do it usually end up doing it on their own. It's not like you need to access to a school's computer lab these days, you can write code on a smartphone. Granted, that's far from optimal, but so are most school computer labs.
Is there really some huge demographic of people who are both talented and want to program, but somehow don't figure that out on their own by age 15? Seems unlikely to me. Kids with interest in this sort of stuff are already working on it themselves. The last thing they want is to sit in a classroom typing Hello World programs over and over again until everyone catches up. All that's going to to do is bore them. The same types of people who excel at programming, also get bored easily working in a classroom setting. So why taint their favorite activity?