Begin to model (design) an online Baseball Spring Training (or your favorite sports team) Ticket sales system. List the possible classes, methods, and attributes.

A quick way to tell if something is a class or method is to do a noun-verb test. Make a list of the more important items in your system.

Go back and if the item is a noun, it's a object (class); if a verb, it's a method. Attributes are local variables like if car was a class, color of car would be an attribute for one object of that class.