The Oracle SQL Interactive Workbook 2nd Edition contains a number of tables used to illustrate additional functionality and concepts. If you wish to try out some of these examples you can install these tables into the STUDENT schema.
Before creating these additional tables, you must have created a STUDENT account. Then run the script sql_book_add_tables.sql script as described in the readme file under the heading "4. Additional Example Table Installation Instructions." The readme.txt or readme.pdf (if you have Adobe Acrobat Reader) file in found in the c:\guest\schemasetup default directory created when you downloaded the STUDENT database schema.
You can find more information on example tables on the downloads page.