This is a Microsoft Publisher file. It has the different levels of worksheets contained in my Number Sense paper. In publisher, you can randomize the problems. This will create a new worksheet while keeping the exact same problems. Simply highlight a row or column and hit CTRL-X and then highlight the empty row or column and hit CTRL-V. Do this several times for several rows and columns and you will have a new worksheet. The same worksheet given every day will not teach children to think about the numbers.