Final answer:
Crystal's change in attitude about school is shown by her shift from being indifferent or reserved about her school experiences to sharing them with pride and detail.
Step-by-step explanation:
Evidence revealing a change in Crystal's attitude about school can be understood through how she communicates her experiences to her parents. Initially, she may have been indifferent or not very open about sharing, stating school was 'fine,' but later she might express herself with more detail and a sense of pride. This shift indicates that her attitude towards school has become more positive and engaged.