I created a tool that the children can use to concretely see that when you multiply decimals by powers of ten that you are moving the digits to the left or right of the decimal. I have many inclusion and some non-inclusion students who needed a more hands-on approach. I have many different approaches to help them learn and understand this standard.
I used a piece of oak tag and made slits to weave a sentence strip, cut in half horizontally. The kids move the digits right or left to see the pattern.