Tile it first
Hand out square tiles and have kids cover a rectangle with no gaps or overlaps. Count the tiles, then count the rows. Kids discover the rows-times-columns shortcut on their own, which beats being told.
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 withFinding the Area of Grid Shapes WorksheetWorksheetsOpen it →























