I thought this requirement was just an attempt to hide indoctrination and low quality teaching, but I have to admit that it has merit.
The idea of disallowing parental involvement and oversight of their student in public school has no merit.
The one exception to this, is if a parent/guardian is abusing the student in some manner, the child should have an outlet to report such activity. But, that does not equate to prohibiting parents from seeing exactly what the Marxist NEA drones are teaching kids.
That said, parents should not be allowed to interrupt teaching sessions, but they should still be allowed to observe.
Actually, online entertainment would be a STEP UP for participation of some parents involvement in their kids educations.
Just think of this as them auditing classes and all is good.
Well, if its for the children then it must be okay.