I am not "up on" USA law when it comes to Church and State laws. I found these legal opinions and the article in the link below interesting.

"The child is not the mere creature of the state; those who nurture him and direct his destiny have the right, coupled with the high duty, to recognize and prepare him for additional obligations."
(USA Justice James Clark McReynolds,1925, Pierce v. Society of Sisters)

"(No USA government) "can force nor influence a person to go to or to remain away from church against his will, or force him to profess a belief or disbelief in any religion," and that it could not penalize anyone "for entertaining or professing religious beliefs or disbeliefs, for church attendance or nonattendance." (USA Justice Hugo Black, Everson v. Board of Education,1947),

From:
church and state in the USA