It's important to have good attendance at school.
Isaac is a high school student that cannot wait to get a job and move out.
Issac wants to be done with high school.
Isaac works hard in school in an effort to graduate earlier than normal, so he can be done with school.
Isaac decides to stop going to classes as much as possible because he wants to move past school.
Isaac earns a diploma and is able to land an entry level job which allows him to start saving towards an apartment of his own.
Isaac is eventually expelled for his bad attendance and without a diploma he finds any job searching very difficult.