Stack the places
Have kids build a number on a place value mat, then build it again one place to the left. Ask "What happened to the value?" Watching each digit become ten times bigger makes the rule something they discover, not memorize.
Why it works: the U.S. Department of Education's guide for teaching elementary math recommends moving from hands-on objects to drawings to numbers.
Try it withPBJ Place Value ActivityActivitiesOpen it →









