Just like my Billions to Ten Thousandths mat, I use this to teach PLACE VALUE.
I laminate the mats and use dry erase pens which wipe off easily with a tissue. This mat has 5 boxes. You can use them according to your students' needs, but I use them in a number of ways:
(a) Write this number (then I say the number).
(b) Write any number with a 4 in the millions place and an 8 in the tens place.
(c) Write any even (or odd) number with 5 digits.
(d) Write the number after ...
(e) Write the number before ...
(f) I'm thinking of a number. It has a 7 in the hundreds place, a 5 in the tens place (and the student writes the number as you speak, then says the whole number to you when you have finished)
The applications are up to you and the needs of your learners. I have lots of place value resources in my Learning-solutions store that you might be able to use.