Get your HS coaches involved!
Meet with your high school coaches and learn about their expectations from the athletes once they get into HS. They will often give your drills to work on what they see as weaknesses in the HS athletes.
Having a continual conversation will only strengthen your program. Schedule a HS game where your entire youth program shows up in uniform to cheer them on!
Nothing better as a HS coach as to see a whole sea of younger players in the stands!