This is a rigorous 4.NBT.1 lesson that helps students understand place value as shifts on the place value chart as 10x, 100x, or 1,000x greater as you move left along a number. There is a human place value chart that accompanies this lesson. I take place value cards in order along the wall. Students choose digits and stand under than place values. 10x would shift the number to the left and affix a zero to the end of the number, etc. For more information about this activity, please email me.