You need to contact whoever is planning your school's QuickBooks class and inform them that the 2002 version will not even be supported by Intuit after April 30, 2005 so they are teaching an obsolete course. That's why you can't find it anywhere. You can see the Intuit Sunset Information at the following web site:
If they won't change their course, purchase a current version and you will still be able to follow along with the class because the basic screen layout has remained the same except for programming improvements. How you operate the basics is true in whatever version you are using since 2002.