How do Mama and Big Ma relate to prejudice differently in Roll of Thunder Hear My Cry

Mama is outspoken about racism. This outspokenness results in her being fired by the white school board. Though she tries to keep stories of the violence and injustice around them from her children, she ultimately cannot shield them from the truth. Big Ma is pragmatic about racism. She has experienced it all her life and expects it. She looks for the best way to protect the family and their land.