Both lower_level_thinking worksheets and too many (even high quality) worksheets can hold students back by not providing stimulus and challenge. Studies have shown for years (just do a Google search!) that children learn best through active involvement and real_life experiences. Virtually every teacher knows that children learn to read by being exposed to books and by being read to, NOT by completing worksheets. The same applies to all areas of learning.
One of the features of Excel that is often overlooked is working with grouped worksheets. When you group the worksheets within a workbook, you can perform operations to several worksheets at one time. This eliminates the necessity of doing the same operation over and over to different worksheets. To group worksheets which are next to each other in the workbook: Click on the sheet tab for the first worksheet. Hold the Shift Key. Click on the last sheet tab to be included in the group. To group worksheets which are not right next to each other: Click on the sheet tab for the first worksheet. Hold the Control Key. Click on each sheet tab to be included in the group