Answer:
He does this by rejecting the racist concepts that society has imposed and teaching his children to follow his example and put themselves in the shoes of others to understand how they feel.
Step-by-step explanation:
Jim Crow's laws were extremely racist and segregationist laws, which sought to devalue and injustice African-American society. "To Kill a Mockingbird," in turn, is a book that shows how racism is deeply rooted in society, reaching the point of allowing horrible injustices to happen to the black population, to the point that this population takes serious risks to their lives and freedom.
Atticus is an essential character in this book, as he stands in favor of the wronged blacks, putting himself in their shoes and understanding the social danger they face. This empathy of Atticus, makes him refuse all racist concepts that society tries to impose on him, even if he is harmed by it. In addition, he encourages his children to follow his example, showing that no one is born a racist, but is taught to be a racist. This behavior of Atticus goes against the whole ideology of the Jim Crow laws, showing a discreet but impactful protest to those laws.