To be able to possess the inner strength of self-discipline in order to pursue own's goals is a much-needed character trait. To be able to control one's feelings goes a long way in achieving goals. To remain focused and stay on task is of great value to becoming mature. The following books can help in aiding that discussion as you read together.
Roll of Thunder, Hear My Cry by Mildred D. Taylor. This is the story of a tween girl, Cassie Logan, set in the 1900's. She is innocent to the racism her parents face every day as her "world" is attending an all-black school and living in an all-black community. This is changed when while walking to school splashing through the mud and rain she gets heckled by the white children riding to their schools in a shiny bus. As the year goes by Cassie learns importance of developing courage, responsibility and self-discipline.
Hans Brinker and the Silver Skates (reintroduced) by Mary Maples Dodge The story of a young boy, Hans Brinker and his sister Gretel whose goal is to skate in the great ice-skating December race. Sadly, his father falls and suffers head trauma that leaves him unable to work. Supporting the family is now left up to Hans, Gretel, and their mother. How to do this as well as achieve his goal of ice skating will take all the self-discipline he has.
Little Women (part of Puffin in Bloom series of Penguin Random House) written by Louisa May Alcott. The classic story of a family with four girls who lives are challenged through events and circumstances. The one sister, Jo, who is the "center" of this group of four sisters, is a tomboy who must learn to control her "hot" temper and stubborn personality. The book follows their childhood through womanhood.
Happy reading!