how to excel at the same time to replace a number of worksheet data? ? ?

Curriculum issues
the school curriculum of all classes in a xls file (a table for each class of the school timetable), the whole class, 72, a total of 72 worksheet.
I want to All of the “sport” with “Sports and Health” and “information” with “information technology”, how do ????
will not be a table with the table after another to replace it features ????

If EXCEL in a document, then can the work of 72 tables are selected (for example, the names of each worksheet for Sheet1 , Sheet2 ….sheet72, first click sheet1, the installation of Shift key, to find out Sheet72, click to select all), can be used after all to replace the