16 kit comprising books, workbooks, worksheets, charts, diagrams, videotapes, video disks, computer programs, CD-ROMs, practice tests, teachers' and presenters' manuals, or kits comprising practice tests and at least one of the aforesaid goods, all in the field of educational test preparation; books, workbooks, worksheets, charts, diagrams, practice tests, teachers' and presenters manuals, all in the field of educational test preparation