Box Method Tutorial

I like the way she sets up the boxes to show the numbers in expanded form. But I'm not crazy about the way that she adds up the products at the end. In my opinion, it's better to stack the numbers, putting the largest on the top, so that carrying is easier... Like this (look all the way right!)...

12000

1800
800

150

120

+ 10

But both ways work! There's more than one way to solve a problem!