Snapped this photo right after my fifth grade math class.
I love this stuff. See all those pencil shavings? Know what that means?
People were making mistakes. Mistakes they felt safe enough to make. Mistakes that they cared enough to correct. Consider how important that is to a room full of perfectionists.
Makes my day.
Soapbox: The Way I see Things 
Now that is the way I see things also!
We all make them, important lessons to learn!