During the course of The Blind Side, Michael is transformed from a shy boy living in poverty, into a highly confident and successful sportsman. This change was brought about with the support of the Tuohey family with whom he came to belong after they took care of, then adopted him into their family. This family also helped him break away from the dangerous lower class society in which he didnt really belong, as shown in the scene where he goes back after living with the Tuoheys and gets in a fight with the local gang; and start to belong to the upper class society of Wingate which he previously didnt belong to.
Throughout the film Michael adopts the Tuohey family as his own, as he didnt belong to his biological family due to the lack of a father, and his moms drug problems, as shown by the terrible flashbacks he has of being forcefully separated from his mother and brothers. Initially Michael rejects the attempts the Tuoheys make to help him as he feels that he doesnt belong with them due to their position in society and skin colour, as shown by his body language, being conservative as he is always rubbing his arms close to his body. However after he is given a plate at thanksgiving, a huge gesture to him as he struggles for food, he feels as though he belongs with them. This is later confirmed after they include him in their family Christmas card, which is seen as strange to others, like cousin Bobby who asks Yall know theres a coloured boy in your Christmas Card, however the family dont mind and laugh it off as they know he is part of their family.
Throughout the film it is shown that Michael doesnt belong in the lower class society where there are no aspirations to become successful, or the upper class society where there are these aspirations; until he becomes part of the Tuohey family. Early in the film Michael is shown to not belong amongst lower class as when he is walking by himself along a path, children from this society are playing with each all around him, showing he doesnt belong with them. When he goes to Wingate he is shunned by the white populous as well, due to his size and skin colour, like a fly in the milk.
He doesnt belong as others ignore him and move away from him when possible, as shown when he tries to talk to the two little girls on swings but they run from him. After the Tuoheys take him however in he learns how to belong with others in their society through improved body language, smiling more, and becoming better known through his sporting prowess. This is revealed when he talks the same two girls and they ask him to push them as they are no longer scared.
This shows how Michael was able to change his life for the better because of a feeling of belonging giving him more confidence, so he could pursue his dream of playing football professionally. It shows the power that belonging in a family has and how society is able to accept or reject its members.