You can use the Fill command in the Editing Group on the Home ribbon bar to fill information across worksheets when they are grouped. For example, if you add a few worksheets to your workbook and you can to copy parts of one worksheet to another, you could use copy and paste, however, this could take several operations to perform. By grouping the worksheets and using the fill command, you could quickly copy parts of the original worksheet to the new worksheets inserted into the workbook.
As far as using worksheets for busy work, the verdict is in. It is destructive to classroom learning to assign worksheets to simply keep students occupied. Busy work creates monotony, causes boredom and increases the likelihood of behavior problems. To know if you are on the right track with worksheets in your classroom, answer (honestly) these simple questions: Do my students groan when I hand out a worksheet? (The answer should be no.) Are my lesson plans based on worksheets? (The answer should be no.) Do I feel anxiety if I don't have worksheets copied? (The answer should be no.) Are students excited about learning in my classroom? (The answer should be yes!).