You have two basic options to complete this homework assignment.
You can use SQL Loader or you can create and external table.

http://www.orafaq.com/wiki/SQL*Loader_FAQ

http://asktom.oracle.com/pls/apex/f?...16200346131007

http://oreilly.com/catalog/orsqlload...pter/ch01.html

Creating an external table uses the SQL loader utility, but it allows you to query the external table as well as pull data from it.

Good Luck, and make sure that you put my name on you assignment when you turn it in so that I can get credit.