[speaker001:] Mary, set your alarm clock for seven tomorrow morning.
[speaker002:] Why?
[speaker001:] I'm going to take you to your school to register for classes.
[speaker002:] That's right. I haven't done that yet.
[speaker001:] You can choose classes that you like at the school office.
[speaker002:] Really?
[speaker001:] Well, there are core courses and electives.
[speaker002:] What do they mean?
[speaker001:] Core courses are ones that you must take. Elective courses are ones that you get to choose for yourself.