Answer:
This American myth has taken root in classrooms across the country, where children are being encouraged to create their own "quilt codes" and believe fictional stories as if they reflect proven fact.
Explanation:
The idea in sentence 2 states that there was no historical evidence to show that quilts which were hung on clotheslines were in fact used as secret codes by travelers on the Underground Railway and the sentence that develops this idea is the sentence that says that children in schools are encouraged to to create their own quilt codes and stating that they fictional events as if they were real.
Imagine how the actors move (like stage right, left, upper stage, etc.)