After you create the group, the word "group" appears in the title bar of the workbook. Once they are grouped you can format one worksheet and all of the worksheets will have the same formatting. You can insert a row in a worksheet and the same row will be inserted into all worksheets. This is a great tool when you need for all of your worksheets to have the same formatting.
Then along came digital copiers and the purple_ink mimeograph machine disappeared. But the teaching tool that the mimeograph machine spawned _ the worksheet _ has lived on... and on... and on. For decades _ literally decades _ teachers have been enamored with worksheets. So what is the bottom line? Are worksheets a serious teaching tool or an over_used form of busy work? The answer, of course, is both.