Editable 100 Grid

In this 100 number grid, the teacher can set the start number and the increment number - ie whether the grid starts from 0 or 1 or 83, and whether it counts up in 1s, 2s, 10s or 100s (or any number). There are some blank-out box shapes to the side of the grid, so that you can cover over some numbers and get the children to work out and give them to you back. The start number and increment number are to the right hand side. Change these - don't change any of the numbers on the coloured grid itself.