When teaching place value I like to show my kids place value neighborhood. It’s a cute visual that they really enjoy. I tell them that every three numbers is separated by a comma and is called a period. I call these “period houses”. Inside each “period house” is a baby “ones” place, a momma “tens” place (who is ten times bigger than the baby ones), and a BIG daddy “hundreds” place (who is ten times bigger than the momma tens). Each “period house” is separated by a “comma alley”. EXCEPT, for the decimals place. The decimals place is the only house on the block that gets a period instead of a comma.
I print out one of these neighborhoods for each student and allow them to cut and paste them into their interactive math journals.