@joborg But are those laws actually enforceable if the kids' parents decide to fight? (The parental consent provision in some laws is, at least to me, a murkier area.) Note that the article started by talking about a $90,000 settlement paid by a teacher. I suspect that almost every Federal district court judge and most appellate courts, with the exception of the Fifth Circuit, would bar enforcement. (The Fifth Circuit just upheld another law that they shouldn't have, given binding Supreme Court precedent.) In theory, only the Supreme Court (or a constitutional amendment) can change that 1943 holding.
(Aside: I'm old enough that when I was in grade school, we still had Bible readings, including from the New Testament in a school where most of the students and an overwhelming majority of the teachers were Jewish. And when the Supreme Court (rightly) declared that unconstitutional, there were moves to amend the constitution to permit it. Those went nowhere.)