Internships are a great way to begin networking before you
graduate. In addition, they allow you to apply your "book"
knowledge to real-life situations. With an internship,
you will have practical experience in addition
to your degree.
Try to make this one education -- not social -- related.
The interviewer wants to know about your decision-making
process -- so "It was close to home" might not be the most
effective answer for you.
Try to choose courses that are job-related for the ones you
liked and ones that are not job-related for the ones you
did not like. Avoid saying that you did not like math,
even if it may be true. The interviewer may think that
you have no aptitude for numbers.
Paying for part of all of your education, either through work
or loans that you are repaying, shows responsibility. Even if
you worked "only for spending money," you helped to finance
your college education. Figure up a percentage.
The interviewer may want to be reassured that you do not make
snap decisions.